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Finding the Fourth Proportional to 585,423.78, 807,588.93 and 391,839.58

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Solution

The fourth proportional to 585,423.78, 807,588.93 and 391,839.58 is: 540,540.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    585,423.78 : 807,588.93 = 391,839.58 : x
  2. Step 2: Convert to fraction form
    585,423.78/807,588.93 = 391,839.58/x
  3. Step 3: Cross multiply
    585,423.78x = 807,588.93 × 391,839.58
  4. Step 4: Simplify right side
    585,423.78x = 316,445,307,143.85
  5. Step 5: Solve for x
    x = 316,445,307,143.85/585,423.78
  6. Step 6: Final answer
    x = 540,540.58

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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.