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Finding the Fourth Proportional to 402,389.52, 555,294.60 and 218,626.44

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Solution

The fourth proportional to 402,389.52, 555,294.60 and 218,626.44 is: 301,702.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,389.52 : 555,294.60 = 218,626.44 : x
  2. Step 2: Convert to fraction form
    402,389.52/555,294.60 = 218,626.44/x
  3. Step 3: Cross multiply
    402,389.52x = 555,294.60 × 218,626.44
  4. Step 4: Simplify right side
    402,389.52x = 121,402,081,549.22
  5. Step 5: Solve for x
    x = 121,402,081,549.22/402,389.52
  6. Step 6: Final answer
    x = 301,702.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.