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Finding the Fourth Proportional to 570,402.56, 855,601.50 and 143,939.36

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Solution

The fourth proportional to 570,402.56, 855,601.50 and 143,939.36 is: 215,908.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,402.56 : 855,601.50 = 143,939.36 : x
  2. Step 2: Convert to fraction form
    570,402.56/855,601.50 = 143,939.36/x
  3. Step 3: Cross multiply
    570,402.56x = 855,601.50 × 143,939.36
  4. Step 4: Simplify right side
    570,402.56x = 123,154,732,325.04
  5. Step 5: Solve for x
    x = 123,154,732,325.04/570,402.56
  6. Step 6: Final answer
    x = 215,908.45

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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.