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Finding the Fourth Proportional to 666,987.42, 920,439.26 and 361,064.40

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Solution

The fourth proportional to 666,987.42, 920,439.26 and 361,064.40 is: 498,267.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,987.42 : 920,439.26 = 361,064.40 : x
  2. Step 2: Convert to fraction form
    666,987.42/920,439.26 = 361,064.40/x
  3. Step 3: Cross multiply
    666,987.42x = 920,439.26 × 361,064.40
  4. Step 4: Simplify right side
    666,987.42x = 332,337,842,740.83
  5. Step 5: Solve for x
    x = 332,337,842,740.83/666,987.42
  6. Step 6: Final answer
    x = 498,267.04

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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.