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Finding the Fourth Proportional to 694,428.71, 958,304.55 and 384,331.91

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Solution

The fourth proportional to 694,428.71, 958,304.55 and 384,331.91 is: 530,374.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    694,428.71 : 958,304.55 = 384,331.91 : x
  2. Step 2: Convert to fraction form
    694,428.71/958,304.55 = 384,331.91/x
  3. Step 3: Cross multiply
    694,428.71x = 958,304.55 × 384,331.91
  4. Step 4: Simplify right side
    694,428.71x = 368,307,014,712.91
  5. Step 5: Solve for x
    x = 368,307,014,712.91/694,428.71
  6. Step 6: Final answer
    x = 530,374.12

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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.