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Finding the Fourth Proportional to 659,427.80, 989,141.70 and 423,037.40

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Solution

The fourth proportional to 659,427.80, 989,141.70 and 423,037.40 is: 634,556.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,427.80 : 989,141.70 = 423,037.40 : x
  2. Step 2: Convert to fraction form
    659,427.80/989,141.70 = 423,037.40/x
  3. Step 3: Cross multiply
    659,427.80x = 989,141.70 × 423,037.40
  4. Step 4: Simplify right side
    659,427.80x = 418,443,932,999.58
  5. Step 5: Solve for x
    x = 418,443,932,999.58/659,427.80
  6. Step 6: Final answer
    x = 634,556.10

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Similar ratio
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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.