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Finding the Fourth Proportional to 659,456.64, 989,256.78 and 210,071.88

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Solution

The fourth proportional to 659,456.64, 989,256.78 and 210,071.88 is: 315,130.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,456.64 : 989,256.78 = 210,071.88 : x
  2. Step 2: Convert to fraction form
    659,456.64/989,256.78 = 210,071.88/x
  3. Step 3: Cross multiply
    659,456.64x = 989,256.78 × 210,071.88
  4. Step 4: Simplify right side
    659,456.64x = 207,815,031,577.35
  5. Step 5: Solve for x
    x = 207,815,031,577.35/659,456.64
  6. Step 6: Final answer
    x = 315,130.70

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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.