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Finding the Fourth Proportional to 296,874.80, 445,312.20 and 86,519.60

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Solution

The fourth proportional to 296,874.80, 445,312.20 and 86,519.60 is: 129,779.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    296,874.80 : 445,312.20 = 86,519.60 : x
  2. Step 2: Convert to fraction form
    296,874.80/445,312.20 = 86,519.60/x
  3. Step 3: Cross multiply
    296,874.80x = 445,312.20 × 86,519.60
  4. Step 4: Simplify right side
    296,874.80x = 38,528,233,419.12
  5. Step 5: Solve for x
    x = 38,528,233,419.12/296,874.80
  6. Step 6: Final answer
    x = 129,779.40

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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.