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Finding the Fourth Proportional to 425,810.11, 638,752.05 and 156,011.53

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Solution

The fourth proportional to 425,810.11, 638,752.05 and 156,011.53 is: 234,030.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,810.11 : 638,752.05 = 156,011.53 : x
  2. Step 2: Convert to fraction form
    425,810.11/638,752.05 = 156,011.53/x
  3. Step 3: Cross multiply
    425,810.11x = 638,752.05 × 156,011.53
  4. Step 4: Simplify right side
    425,810.11x = 99,652,680,637.32
  5. Step 5: Solve for x
    x = 99,652,680,637.32/425,810.11
  6. Step 6: Final answer
    x = 234,030.80

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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.