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Finding the Fourth Proportional to 296,913.60, 445,370.40 and 86,572.80

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Solution

The fourth proportional to 296,913.60, 445,370.40 and 86,572.80 is: 129,859.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    296,913.60 : 445,370.40 = 86,572.80 : x
  2. Step 2: Convert to fraction form
    296,913.60/445,370.40 = 86,572.80/x
  3. Step 3: Cross multiply
    296,913.60x = 445,370.40 × 86,572.80
  4. Step 4: Simplify right side
    296,913.60x = 38,556,962,565.12
  5. Step 5: Solve for x
    x = 38,556,962,565.12/296,913.60
  6. Step 6: Final answer
    x = 129,859.20

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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.