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Finding the Fourth Proportional to 528,591.32, 729,079.21 and 485,123.88

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Solution

The fourth proportional to 528,591.32, 729,079.21 and 485,123.88 is: 669,125.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,591.32 : 729,079.21 = 485,123.88 : x
  2. Step 2: Convert to fraction form
    528,591.32/729,079.21 = 485,123.88/x
  3. Step 3: Cross multiply
    528,591.32x = 729,079.21 × 485,123.88
  4. Step 4: Simplify right side
    528,591.32x = 353,693,738,522.99
  5. Step 5: Solve for x
    x = 353,693,738,522.99/528,591.32
  6. Step 6: Final answer
    x = 669,125.14

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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.