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Finding the Fourth Proportional to 866,999.40, 1,300,434.30 and 361,429.80

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Solution

The fourth proportional to 866,999.40, 1,300,434.30 and 361,429.80 is: 542,117.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    866,999.40 : 1,300,434.30 = 361,429.80 : x
  2. Step 2: Convert to fraction form
    866,999.40/1,300,434.30 = 361,429.80/x
  3. Step 3: Cross multiply
    866,999.40x = 1,300,434.30 × 361,429.80
  4. Step 4: Simplify right side
    866,999.40x = 470,015,708,962.14
  5. Step 5: Solve for x
    x = 470,015,708,962.14/866,999.40
  6. Step 6: Final answer
    x = 542,117.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.