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Finding the Fourth Proportional to 551,935.89, 761,603.31 and 319,402.71

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Solution

The fourth proportional to 551,935.89, 761,603.31 and 319,402.71 is: 440,736.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,935.89 : 761,603.31 = 319,402.71 : x
  2. Step 2: Convert to fraction form
    551,935.89/761,603.31 = 319,402.71/x
  3. Step 3: Cross multiply
    551,935.89x = 761,603.31 × 319,402.71
  4. Step 4: Simplify right side
    551,935.89x = 243,258,161,158.97
  5. Step 5: Solve for x
    x = 243,258,161,158.97/551,935.89
  6. Step 6: Final answer
    x = 440,736.26

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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.