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Finding the Fourth Proportional to 646,936.40, 970,404.60 and 578,507.60

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Solution

The fourth proportional to 646,936.40, 970,404.60 and 578,507.60 is: 867,761.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,936.40 : 970,404.60 = 578,507.60 : x
  2. Step 2: Convert to fraction form
    646,936.40/970,404.60 = 578,507.60/x
  3. Step 3: Cross multiply
    646,936.40x = 970,404.60 × 578,507.60
  4. Step 4: Simplify right side
    646,936.40x = 561,386,436,174.96
  5. Step 5: Solve for x
    x = 561,386,436,174.96/646,936.40
  6. Step 6: Final answer
    x = 867,761.40

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.