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Finding the Fourth Proportional to 425,548.55, 638,468.64 and 145,262.63

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Solution

The fourth proportional to 425,548.55, 638,468.64 and 145,262.63 is: 217,943.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,548.55 : 638,468.64 = 145,262.63 : x
  2. Step 2: Convert to fraction form
    425,548.55/638,468.64 = 145,262.63/x
  3. Step 3: Cross multiply
    425,548.55x = 638,468.64 × 145,262.63
  4. Step 4: Simplify right side
    425,548.55x = 92,745,633,818.92
  5. Step 5: Solve for x
    x = 92,745,633,818.92/425,548.55
  6. Step 6: Final answer
    x = 217,943.72

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1.5x scale

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.