Home / 428,254.77-642,441.13-143,967.39

Finding the Fourth Proportional to 428,254.77, 642,441.13 and 143,967.39

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Solution

The fourth proportional to 428,254.77, 642,441.13 and 143,967.39 is: 215,970.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,254.77 : 642,441.13 = 143,967.39 : x
  2. Step 2: Convert to fraction form
    428,254.77/642,441.13 = 143,967.39/x
  3. Step 3: Cross multiply
    428,254.77x = 642,441.13 × 143,967.39
  4. Step 4: Simplify right side
    428,254.77x = 92,490,572,714.75
  5. Step 5: Solve for x
    x = 92,490,572,714.75/428,254.77
  6. Step 6: Final answer
    x = 215,970.91

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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.