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Finding the Fourth Proportional to 713,949.60, 985,244.70 and 387,261.80

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Solution

The fourth proportional to 713,949.60, 985,244.70 and 387,261.80 is: 534,418.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,949.60 : 985,244.70 = 387,261.80 : x
  2. Step 2: Convert to fraction form
    713,949.60/985,244.70 = 387,261.80/x
  3. Step 3: Cross multiply
    713,949.60x = 985,244.70 × 387,261.80
  4. Step 4: Simplify right side
    713,949.60x = 381,547,635,962.46
  5. Step 5: Solve for x
    x = 381,547,635,962.46/713,949.60
  6. Step 6: Final answer
    x = 534,418.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.