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Finding the Fourth Proportional to 425,781, 638,671.50 and 238,807.08

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Solution

The fourth proportional to 425,781, 638,671.50 and 238,807.08 is: 358,210.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,781 : 638,671.50 = 238,807.08 : x
  2. Step 2: Convert to fraction form
    425,781/638,671.50 = 238,807.08/x
  3. Step 3: Cross multiply
    425,781x = 638,671.50 × 238,807.08
  4. Step 4: Simplify right side
    425,781x = 152,519,275,994.22
  5. Step 5: Solve for x
    x = 152,519,275,994.22/425,781
  6. Step 6: Final answer
    x = 358,210.62

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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.