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Finding the Fourth Proportional to 528,771.52, 731,139.84 and 520,225.12

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Solution

The fourth proportional to 528,771.52, 731,139.84 and 520,225.12 is: 719,322.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,771.52 : 731,139.84 = 520,225.12 : x
  2. Step 2: Convert to fraction form
    528,771.52/731,139.84 = 520,225.12/x
  3. Step 3: Cross multiply
    528,771.52x = 731,139.84 × 520,225.12
  4. Step 4: Simplify right side
    528,771.52x = 380,357,311,000.78
  5. Step 5: Solve for x
    x = 380,357,311,000.78/528,771.52
  6. Step 6: Final answer
    x = 719,322.61

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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.