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Finding the Fourth Proportional to 570,917.40, 856,116.90 and 215,813.40

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Solution

The fourth proportional to 570,917.40, 856,116.90 and 215,813.40 is: 323,622.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,917.40 : 856,116.90 = 215,813.40 : x
  2. Step 2: Convert to fraction form
    570,917.40/856,116.90 = 215,813.40/x
  3. Step 3: Cross multiply
    570,917.40x = 856,116.90 × 215,813.40
  4. Step 4: Simplify right side
    570,917.40x = 184,761,498,986.46
  5. Step 5: Solve for x
    x = 184,761,498,986.46/570,917.40
  6. Step 6: Final answer
    x = 323,622.12

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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.