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Finding the Fourth Proportional to 887,139.60, 1,330,709.40 and 413,872.80

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Solution

The fourth proportional to 887,139.60, 1,330,709.40 and 413,872.80 is: 620,809.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    887,139.60 : 1,330,709.40 = 413,872.80 : x
  2. Step 2: Convert to fraction form
    887,139.60/1,330,709.40 = 413,872.80/x
  3. Step 3: Cross multiply
    887,139.60x = 1,330,709.40 × 413,872.80
  4. Step 4: Simplify right side
    887,139.60x = 550,744,425,364.32
  5. Step 5: Solve for x
    x = 550,744,425,364.32/887,139.60
  6. Step 6: Final answer
    x = 620,809.20

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Similar ratio
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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.