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Finding the Fourth Proportional to 425,703.42, 638,620.71 and 145,155.06

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Solution

The fourth proportional to 425,703.42, 638,620.71 and 145,155.06 is: 217,754.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,703.42 : 638,620.71 = 145,155.06 : x
  2. Step 2: Convert to fraction form
    425,703.42/638,620.71 = 145,155.06/x
  3. Step 3: Cross multiply
    425,703.42x = 638,620.71 × 145,155.06
  4. Step 4: Simplify right side
    425,703.42x = 92,699,027,477.29
  5. Step 5: Solve for x
    x = 92,699,027,477.29/425,703.42
  6. Step 6: Final answer
    x = 217,754.95

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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.