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Finding the Fourth Proportional to 528,806.72, 792,937.92 and 213,178.88

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Solution

The fourth proportional to 528,806.72, 792,937.92 and 213,178.88 is: 319,658.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,806.72 : 792,937.92 = 213,178.88 : x
  2. Step 2: Convert to fraction form
    528,806.72/792,937.92 = 213,178.88/x
  3. Step 3: Cross multiply
    528,806.72x = 792,937.92 × 213,178.88
  4. Step 4: Simplify right side
    528,806.72x = 169,037,617,695.13
  5. Step 5: Solve for x
    x = 169,037,617,695.13/528,806.72
  6. Step 6: Final answer
    x = 319,658.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.