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Finding the Fourth Proportional to 659,878.30, 989,817.45 and 491,916.70

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Solution

The fourth proportional to 659,878.30, 989,817.45 and 491,916.70 is: 737,875.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,878.30 : 989,817.45 = 491,916.70 : x
  2. Step 2: Convert to fraction form
    659,878.30/989,817.45 = 491,916.70/x
  3. Step 3: Cross multiply
    659,878.30x = 989,817.45 × 491,916.70
  4. Step 4: Simplify right side
    659,878.30x = 486,907,733,606.42
  5. Step 5: Solve for x
    x = 486,907,733,606.42/659,878.30
  6. Step 6: Final answer
    x = 737,875.05

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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.