Home / 718,815.78-991,962.99-396,545.94

Finding the Fourth Proportional to 718,815.78, 991,962.99 and 396,545.94

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Solution

The fourth proportional to 718,815.78, 991,962.99 and 396,545.94 is: 547,231.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,815.78 : 991,962.99 = 396,545.94 : x
  2. Step 2: Convert to fraction form
    718,815.78/991,962.99 = 396,545.94/x
  3. Step 3: Cross multiply
    718,815.78x = 991,962.99 × 396,545.94
  4. Step 4: Simplify right side
    718,815.78x = 393,358,896,314.76
  5. Step 5: Solve for x
    x = 393,358,896,314.76/718,815.78
  6. Step 6: Final answer
    x = 547,231.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.