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Finding the Fourth Proportional to 570,389.81, 856,425.80 and 318,163.10

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Solution

The fourth proportional to 570,389.81, 856,425.80 and 318,163.10 is: 477,713.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,389.81 : 856,425.80 = 318,163.10 : x
  2. Step 2: Convert to fraction form
    570,389.81/856,425.80 = 318,163.10/x
  3. Step 3: Cross multiply
    570,389.81x = 856,425.80 × 318,163.10
  4. Step 4: Simplify right side
    570,389.81x = 272,483,087,447.98
  5. Step 5: Solve for x
    x = 272,483,087,447.98/570,389.81
  6. Step 6: Final answer
    x = 477,713.81

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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.