Home / 428,159.04-642,312.78-143,877.36

Finding the Fourth Proportional to 428,159.04, 642,312.78 and 143,877.36

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Solution

The fourth proportional to 428,159.04, 642,312.78 and 143,877.36 is: 215,840.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,159.04 : 642,312.78 = 143,877.36 : x
  2. Step 2: Convert to fraction form
    428,159.04/642,312.78 = 143,877.36/x
  3. Step 3: Cross multiply
    428,159.04x = 642,312.78 × 143,877.36
  4. Step 4: Simplify right side
    428,159.04x = 92,414,267,080.66
  5. Step 5: Solve for x
    x = 92,414,267,080.66/428,159.04
  6. Step 6: Final answer
    x = 215,840.98

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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.