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Finding the Fourth Proportional to 280,210.44, 386,691.68 and 152,888.72

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Solution

The fourth proportional to 280,210.44, 386,691.68 and 152,888.72 is: 210,987.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,210.44 : 386,691.68 = 152,888.72 : x
  2. Step 2: Convert to fraction form
    280,210.44/386,691.68 = 152,888.72/x
  3. Step 3: Cross multiply
    280,210.44x = 386,691.68 × 152,888.72
  4. Step 4: Simplify right side
    280,210.44x = 59,120,795,989.85
  5. Step 5: Solve for x
    x = 59,120,795,989.85/280,210.44
  6. Step 6: Final answer
    x = 210,987.13

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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.