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Finding the Fourth Proportional to 651,803.40, 977,705.10 and 423,480.60

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Solution

The fourth proportional to 651,803.40, 977,705.10 and 423,480.60 is: 635,220.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,803.40 : 977,705.10 = 423,480.60 : x
  2. Step 2: Convert to fraction form
    651,803.40/977,705.10 = 423,480.60/x
  3. Step 3: Cross multiply
    651,803.40x = 977,705.10 × 423,480.60
  4. Step 4: Simplify right side
    651,803.40x = 414,039,142,371.06
  5. Step 5: Solve for x
    x = 414,039,142,371.06/651,803.40
  6. Step 6: Final answer
    x = 635,220.90

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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.