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Finding the Fourth Proportional to 871,601.20, 1,307,866.20 and 339,139.60

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Solution

The fourth proportional to 871,601.20, 1,307,866.20 and 339,139.60 is: 508,890.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,601.20 : 1,307,866.20 = 339,139.60 : x
  2. Step 2: Convert to fraction form
    871,601.20/1,307,866.20 = 339,139.60/x
  3. Step 3: Cross multiply
    871,601.20x = 1,307,866.20 × 339,139.60
  4. Step 4: Simplify right side
    871,601.20x = 443,549,219,921.52
  5. Step 5: Solve for x
    x = 443,549,219,921.52/871,601.20
  6. Step 6: Final answer
    x = 508,890.10

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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.