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Finding the Fourth Proportional to 280,855.32, 387,586.53 and 153,530.97

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Solution

The fourth proportional to 280,855.32, 387,586.53 and 153,530.97 is: 211,876.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,855.32 : 387,586.53 = 153,530.97 : x
  2. Step 2: Convert to fraction form
    280,855.32/387,586.53 = 153,530.97/x
  3. Step 3: Cross multiply
    280,855.32x = 387,586.53 × 153,530.97
  4. Step 4: Simplify right side
    280,855.32x = 59,506,535,909.83
  5. Step 5: Solve for x
    x = 59,506,535,909.83/280,855.32
  6. Step 6: Final answer
    x = 211,876.12

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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.