Home / 724,711.80-1,087,067.70-512,135.40

Finding the Fourth Proportional to 724,711.80, 1,087,067.70 and 512,135.40

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Solution

The fourth proportional to 724,711.80, 1,087,067.70 and 512,135.40 is: 768,203.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,711.80 : 1,087,067.70 = 512,135.40 : x
  2. Step 2: Convert to fraction form
    724,711.80/1,087,067.70 = 512,135.40/x
  3. Step 3: Cross multiply
    724,711.80x = 1,087,067.70 × 512,135.40
  4. Step 4: Simplify right side
    724,711.80x = 556,725,851,366.58
  5. Step 5: Solve for x
    x = 556,725,851,366.58/724,711.80
  6. Step 6: Final answer
    x = 768,203.10

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Double scale
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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.