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Finding the Fourth Proportional to 628,430.92, 942,646.38 and 517,389.64

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Solution

The fourth proportional to 628,430.92, 942,646.38 and 517,389.64 is: 776,084.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,430.92 : 942,646.38 = 517,389.64 : x
  2. Step 2: Convert to fraction form
    628,430.92/942,646.38 = 517,389.64/x
  3. Step 3: Cross multiply
    628,430.92x = 942,646.38 × 517,389.64
  4. Step 4: Simplify right side
    628,430.92x = 487,715,471,195.50
  5. Step 5: Solve for x
    x = 487,715,471,195.50/628,430.92
  6. Step 6: Final answer
    x = 776,084.46

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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.