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Finding the Fourth Proportional to 720,870.48, 994,714.44 and 398,537.04

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Solution

The fourth proportional to 720,870.48, 994,714.44 and 398,537.04 is: 549,933.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,870.48 : 994,714.44 = 398,537.04 : x
  2. Step 2: Convert to fraction form
    720,870.48/994,714.44 = 398,537.04/x
  3. Step 3: Cross multiply
    720,870.48x = 994,714.44 × 398,537.04
  4. Step 4: Simplify right side
    720,870.48x = 396,430,548,562.86
  5. Step 5: Solve for x
    x = 396,430,548,562.86/720,870.48
  6. Step 6: Final answer
    x = 549,933.11

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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.