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Finding the Fourth Proportional to 585,491.43, 807,730.70 and 391,961.48

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Solution

The fourth proportional to 585,491.43, 807,730.70 and 391,961.48 is: 540,741.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    585,491.43 : 807,730.70 = 391,961.48 : x
  2. Step 2: Convert to fraction form
    585,491.43/807,730.70 = 391,961.48/x
  3. Step 3: Cross multiply
    585,491.43x = 807,730.70 × 391,961.48
  4. Step 4: Simplify right side
    585,491.43x = 316,599,317,554.69
  5. Step 5: Solve for x
    x = 316,599,317,554.69/585,491.43
  6. Step 6: Final answer
    x = 540,741.16

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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.