Home / 642,823.63-887,036.94-356,319.34

Finding the Fourth Proportional to 642,823.63, 887,036.94 and 356,319.34

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Solution

The fourth proportional to 642,823.63, 887,036.94 and 356,319.34 is: 491,687.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,823.63 : 887,036.94 = 356,319.34 : x
  2. Step 2: Convert to fraction form
    642,823.63/887,036.94 = 356,319.34/x
  3. Step 3: Cross multiply
    642,823.63x = 887,036.94 × 356,319.34
  4. Step 4: Simplify right side
    642,823.63x = 316,068,414,798.83
  5. Step 5: Solve for x
    x = 316,068,414,798.83/642,823.63
  6. Step 6: Final answer
    x = 491,687.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.