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Finding the Fourth Proportional to 570,810.40, 855,601.20 and 215,687.20

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Solution

The fourth proportional to 570,810.40, 855,601.20 and 215,687.20 is: 323,298.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,810.40 : 855,601.20 = 215,687.20 : x
  2. Step 2: Convert to fraction form
    570,810.40/855,601.20 = 215,687.20/x
  3. Step 3: Cross multiply
    570,810.40x = 855,601.20 × 215,687.20
  4. Step 4: Simplify right side
    570,810.40x = 184,542,227,144.64
  5. Step 5: Solve for x
    x = 184,542,227,144.64/570,810.40
  6. Step 6: Final answer
    x = 323,298.64

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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.