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Finding the Fourth Proportional to 424,920.39, 637,382.15 and 158,678.07

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Solution

The fourth proportional to 424,920.39, 637,382.15 and 158,678.07 is: 238,017.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,920.39 : 637,382.15 = 158,678.07 : x
  2. Step 2: Convert to fraction form
    424,920.39/637,382.15 = 158,678.07/x
  3. Step 3: Cross multiply
    424,920.39x = 637,382.15 × 158,678.07
  4. Step 4: Simplify right side
    424,920.39x = 101,138,568,621.06
  5. Step 5: Solve for x
    x = 101,138,568,621.06/424,920.39
  6. Step 6: Final answer
    x = 238,017.69

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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.