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Finding the Fourth Proportional to 659,638.52, 989,498.80 and 238,918.04

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Solution

The fourth proportional to 659,638.52, 989,498.80 and 238,918.04 is: 358,391.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,638.52 : 989,498.80 = 238,918.04 : x
  2. Step 2: Convert to fraction form
    659,638.52/989,498.80 = 238,918.04/x
  3. Step 3: Cross multiply
    659,638.52x = 989,498.80 × 238,918.04
  4. Step 4: Simplify right side
    659,638.52x = 236,409,113,878.35
  5. Step 5: Solve for x
    x = 236,409,113,878.35/659,638.52
  6. Step 6: Final answer
    x = 358,391.92

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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.