Home / 718,721.65-991,818.50-396,424.82

Finding the Fourth Proportional to 718,721.65, 991,818.50 and 396,424.82

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Solution

The fourth proportional to 718,721.65, 991,818.50 and 396,424.82 is: 547,056.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,721.65 : 991,818.50 = 396,424.82 : x
  2. Step 2: Convert to fraction form
    718,721.65/991,818.50 = 396,424.82/x
  3. Step 3: Cross multiply
    718,721.65x = 991,818.50 × 396,424.82
  4. Step 4: Simplify right side
    718,721.65x = 393,181,468,353.05
  5. Step 5: Solve for x
    x = 393,181,468,353.05/718,721.65
  6. Step 6: Final answer
    x = 547,056.67

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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.