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Finding the Fourth Proportional to 354,439.74, 529,400 and 320,654.10

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Solution

The fourth proportional to 354,439.74, 529,400 and 320,654.10 is: 478,936.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,439.74 : 529,400 = 320,654.10 : x
  2. Step 2: Convert to fraction form
    354,439.74/529,400 = 320,654.10/x
  3. Step 3: Cross multiply
    354,439.74x = 529,400 × 320,654.10
  4. Step 4: Simplify right side
    354,439.74x = 169,754,280,540
  5. Step 5: Solve for x
    x = 169,754,280,540/354,439.74
  6. Step 6: Final answer
    x = 478,936.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.