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Finding the Fourth Proportional to 623,659.80, 935,489.70 and 308,731.80

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Solution

The fourth proportional to 623,659.80, 935,489.70 and 308,731.80 is: 463,097.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,659.80 : 935,489.70 = 308,731.80 : x
  2. Step 2: Convert to fraction form
    623,659.80/935,489.70 = 308,731.80/x
  3. Step 3: Cross multiply
    623,659.80x = 935,489.70 × 308,731.80
  4. Step 4: Simplify right side
    623,659.80x = 288,815,418,962.46
  5. Step 5: Solve for x
    x = 288,815,418,962.46/623,659.80
  6. Step 6: Final answer
    x = 463,097.70

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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.