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Finding the Fourth Proportional to 570,390.75, 856,427.21 and 318,164.04

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Solution

The fourth proportional to 570,390.75, 856,427.21 and 318,164.04 is: 477,715.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,390.75 : 856,427.21 = 318,164.04 : x
  2. Step 2: Convert to fraction form
    570,390.75/856,427.21 = 318,164.04/x
  3. Step 3: Cross multiply
    570,390.75x = 856,427.21 × 318,164.04
  4. Step 4: Simplify right side
    570,390.75x = 272,484,339,508.71
  5. Step 5: Solve for x
    x = 272,484,339,508.71/570,390.75
  6. Step 6: Final answer
    x = 477,715.21

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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.