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Finding the Fourth Proportional to 425,855.93, 638,784.17 and 238,998.65

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Solution

The fourth proportional to 425,855.93, 638,784.17 and 238,998.65 is: 358,498.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,855.93 : 638,784.17 = 238,998.65 : x
  2. Step 2: Convert to fraction form
    425,855.93/638,784.17 = 238,998.65/x
  3. Step 3: Cross multiply
    425,855.93x = 638,784.17 × 238,998.65
  4. Step 4: Simplify right side
    425,855.93x = 152,668,554,271.37
  5. Step 5: Solve for x
    x = 152,668,554,271.37/425,855.93
  6. Step 6: Final answer
    x = 358,498.13

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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.