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Finding the Fourth Proportional to 453,403.40, 679,658.70 and 253,819.40

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Solution

The fourth proportional to 453,403.40, 679,658.70 and 253,819.40 is: 380,479.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    453,403.40 : 679,658.70 = 253,819.40 : x
  2. Step 2: Convert to fraction form
    453,403.40/679,658.70 = 253,819.40/x
  3. Step 3: Cross multiply
    453,403.40x = 679,658.70 × 253,819.40
  4. Step 4: Simplify right side
    453,403.40x = 172,510,563,438.78
  5. Step 5: Solve for x
    x = 172,510,563,438.78/453,403.40
  6. Step 6: Final answer
    x = 380,479.20

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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.