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Finding the Fourth Proportional to 280,808.32, 387,538.56 and 159,987.52

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Solution

The fourth proportional to 280,808.32, 387,538.56 and 159,987.52 is: 220,795.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,808.32 : 387,538.56 = 159,987.52 : x
  2. Step 2: Convert to fraction form
    280,808.32/387,538.56 = 159,987.52/x
  3. Step 3: Cross multiply
    280,808.32x = 387,538.56 × 159,987.52
  4. Step 4: Simplify right side
    280,808.32x = 62,001,333,118.77
  5. Step 5: Solve for x
    x = 62,001,333,118.77/280,808.32
  6. Step 6: Final answer
    x = 220,795.93

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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.