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Finding the Fourth Proportional to 570,387.81, 856,422.80 and 318,161.10

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Solution

The fourth proportional to 570,387.81, 856,422.80 and 318,161.10 is: 477,710.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,387.81 : 856,422.80 = 318,161.10 : x
  2. Step 2: Convert to fraction form
    570,387.81/856,422.80 = 318,161.10/x
  3. Step 3: Cross multiply
    570,387.81x = 856,422.80 × 318,161.10
  4. Step 4: Simplify right side
    570,387.81x = 272,480,420,113.08
  5. Step 5: Solve for x
    x = 272,480,420,113.08/570,387.81
  6. Step 6: Final answer
    x = 477,710.81

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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.