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Finding the Fourth Proportional to 667,392.84, 920,264.13 and 425,291.94

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Solution

The fourth proportional to 667,392.84, 920,264.13 and 425,291.94 is: 586,432.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,392.84 : 920,264.13 = 425,291.94 : x
  2. Step 2: Convert to fraction form
    667,392.84/920,264.13 = 425,291.94/x
  3. Step 3: Cross multiply
    667,392.84x = 920,264.13 × 425,291.94
  4. Step 4: Simplify right side
    667,392.84x = 391,380,917,160.11
  5. Step 5: Solve for x
    x = 391,380,917,160.11/667,392.84
  6. Step 6: Final answer
    x = 586,432.60

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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.