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Finding the Fourth Proportional to 425,417.61, 638,124.11 and 245,386.34

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Solution

The fourth proportional to 425,417.61, 638,124.11 and 245,386.34 is: 368,078.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,417.61 : 638,124.11 = 245,386.34 : x
  2. Step 2: Convert to fraction form
    425,417.61/638,124.11 = 245,386.34/x
  3. Step 3: Cross multiply
    425,417.61x = 638,124.11 × 245,386.34
  4. Step 4: Simplify right side
    425,417.61x = 156,586,942,027.43
  5. Step 5: Solve for x
    x = 156,586,942,027.43/425,417.61
  6. Step 6: Final answer
    x = 368,078.19

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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.