Home / 791,805.90-1,188,000.45-318,830.70

Finding the Fourth Proportional to 791,805.90, 1,188,000.45 and 318,830.70

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Solution

The fourth proportional to 791,805.90, 1,188,000.45 and 318,830.70 is: 478,363.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    791,805.90 : 1,188,000.45 = 318,830.70 : x
  2. Step 2: Convert to fraction form
    791,805.90/1,188,000.45 = 318,830.70/x
  3. Step 3: Cross multiply
    791,805.90x = 1,188,000.45 × 318,830.70
  4. Step 4: Simplify right side
    791,805.90x = 378,771,015,073.82
  5. Step 5: Solve for x
    x = 378,771,015,073.82/791,805.90
  6. Step 6: Final answer
    x = 478,363.47

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1.5x scale

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.