Home / 842,139.64-1,263,253.20-421,273.36

Finding the Fourth Proportional to 842,139.64, 1,263,253.20 and 421,273.36

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Solution

The fourth proportional to 842,139.64, 1,263,253.20 and 421,273.36 is: 631,931.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    842,139.64 : 1,263,253.20 = 421,273.36 : x
  2. Step 2: Convert to fraction form
    842,139.64/1,263,253.20 = 421,273.36/x
  3. Step 3: Cross multiply
    842,139.64x = 1,263,253.20 × 421,273.36
  4. Step 4: Simplify right side
    842,139.64x = 532,174,920,094.75
  5. Step 5: Solve for x
    x = 532,174,920,094.75/842,139.64
  6. Step 6: Final answer
    x = 631,931.92

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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.