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Finding the Fourth Proportional to 691,487.46, 954,262.89 and 385,554.78

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Solution

The fourth proportional to 691,487.46, 954,262.89 and 385,554.78 is: 532,071.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,487.46 : 954,262.89 = 385,554.78 : x
  2. Step 2: Convert to fraction form
    691,487.46/954,262.89 = 385,554.78/x
  3. Step 3: Cross multiply
    691,487.46x = 954,262.89 × 385,554.78
  4. Step 4: Simplify right side
    691,487.46x = 367,920,618,616.11
  5. Step 5: Solve for x
    x = 367,920,618,616.11/691,487.46
  6. Step 6: Final answer
    x = 532,071.28

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1.5x scale

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.