Home / 718,761.63-991,946.75-396,499.89

Finding the Fourth Proportional to 718,761.63, 991,946.75 and 396,499.89

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Solution

The fourth proportional to 718,761.63, 991,946.75 and 396,499.89 is: 547,200.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,761.63 : 991,946.75 = 396,499.89 : x
  2. Step 2: Convert to fraction form
    718,761.63/991,946.75 = 396,499.89/x
  3. Step 3: Cross multiply
    718,761.63x = 991,946.75 × 396,499.89
  4. Step 4: Simplify right side
    718,761.63x = 393,306,777,260.86
  5. Step 5: Solve for x
    x = 393,306,777,260.86/718,761.63
  6. Step 6: Final answer
    x = 547,200.58

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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.