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Finding the Fourth Proportional to 557,156.52, 768,861.90 and 315,437.40

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Solution

The fourth proportional to 557,156.52, 768,861.90 and 315,437.40 is: 435,295.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,156.52 : 768,861.90 = 315,437.40 : x
  2. Step 2: Convert to fraction form
    557,156.52/768,861.90 = 315,437.40/x
  3. Step 3: Cross multiply
    557,156.52x = 768,861.90 × 315,437.40
  4. Step 4: Simplify right side
    557,156.52x = 242,527,798,695.06
  5. Step 5: Solve for x
    x = 242,527,798,695.06/557,156.52
  6. Step 6: Final answer
    x = 435,295.63

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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.