Home / 287,966.18-397,390.65-158,905.91

Finding the Fourth Proportional to 287,966.18, 397,390.65 and 158,905.91

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Solution

The fourth proportional to 287,966.18, 397,390.65 and 158,905.91 is: 219,288.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,966.18 : 397,390.65 = 158,905.91 : x
  2. Step 2: Convert to fraction form
    287,966.18/397,390.65 = 158,905.91/x
  3. Step 3: Cross multiply
    287,966.18x = 397,390.65 × 158,905.91
  4. Step 4: Simplify right side
    287,966.18x = 63,147,722,863.74
  5. Step 5: Solve for x
    x = 63,147,722,863.74/287,966.18
  6. Step 6: Final answer
    x = 219,288.68

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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.