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Finding the Fourth Proportional to 720,819.96, 994,714.02 and 398,521.76

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Solution

The fourth proportional to 720,819.96, 994,714.02 and 398,521.76 is: 549,950.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,819.96 : 994,714.02 = 398,521.76 : x
  2. Step 2: Convert to fraction form
    720,819.96/994,714.02 = 398,521.76/x
  3. Step 3: Cross multiply
    720,819.96x = 994,714.02 × 398,521.76
  4. Step 4: Simplify right side
    720,819.96x = 396,415,181,947.08
  5. Step 5: Solve for x
    x = 396,415,181,947.08/720,819.96
  6. Step 6: Final answer
    x = 549,950.34

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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.