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Finding the Fourth Proportional to 854,586.60, 1,281,879.90 and 429,433.80

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Solution

The fourth proportional to 854,586.60, 1,281,879.90 and 429,433.80 is: 644,150.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    854,586.60 : 1,281,879.90 = 429,433.80 : x
  2. Step 2: Convert to fraction form
    854,586.60/1,281,879.90 = 429,433.80/x
  3. Step 3: Cross multiply
    854,586.60x = 1,281,879.90 × 429,433.80
  4. Step 4: Simplify right side
    854,586.60x = 550,482,556,600.62
  5. Step 5: Solve for x
    x = 550,482,556,600.62/854,586.60
  6. Step 6: Final answer
    x = 644,150.70

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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.