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Finding the Fourth Proportional to 623,419.20, 935,128.80 and 490,708.80

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Solution

The fourth proportional to 623,419.20, 935,128.80 and 490,708.80 is: 736,063.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,419.20 : 935,128.80 = 490,708.80 : x
  2. Step 2: Convert to fraction form
    623,419.20/935,128.80 = 490,708.80/x
  3. Step 3: Cross multiply
    623,419.20x = 935,128.80 × 490,708.80
  4. Step 4: Simplify right side
    623,419.20x = 458,875,931,293.44
  5. Step 5: Solve for x
    x = 458,875,931,293.44/623,419.20
  6. Step 6: Final answer
    x = 736,063.20

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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.