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Finding the Fourth Proportional to 571,318.80, 856,978.20 and 361,885.20

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Solution

The fourth proportional to 571,318.80, 856,978.20 and 361,885.20 is: 542,827.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,318.80 : 856,978.20 = 361,885.20 : x
  2. Step 2: Convert to fraction form
    571,318.80/856,978.20 = 361,885.20/x
  3. Step 3: Cross multiply
    571,318.80x = 856,978.20 × 361,885.20
  4. Step 4: Simplify right side
    571,318.80x = 310,127,727,302.64
  5. Step 5: Solve for x
    x = 310,127,727,302.64/571,318.80
  6. Step 6: Final answer
    x = 542,827.80

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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.