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Finding the Fourth Proportional to 387,605.98, 581,496.72 and 134,898.40

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Solution

The fourth proportional to 387,605.98, 581,496.72 and 134,898.40 is: 202,378.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,605.98 : 581,496.72 = 134,898.40 : x
  2. Step 2: Convert to fraction form
    387,605.98/581,496.72 = 134,898.40/x
  3. Step 3: Cross multiply
    387,605.98x = 581,496.72 × 134,898.40
  4. Step 4: Simplify right side
    387,605.98x = 78,442,977,133.25
  5. Step 5: Solve for x
    x = 78,442,977,133.25/387,605.98
  6. Step 6: Final answer
    x = 202,378.14

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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.