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Finding the Fourth Proportional to 280,607.52, 387,233.52 and 153,279.84

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Solution

The fourth proportional to 280,607.52, 387,233.52 and 153,279.84 is: 211,523.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,607.52 : 387,233.52 = 153,279.84 : x
  2. Step 2: Convert to fraction form
    280,607.52/387,233.52 = 153,279.84/x
  3. Step 3: Cross multiply
    280,607.52x = 387,233.52 × 153,279.84
  4. Step 4: Simplify right side
    280,607.52x = 59,355,091,988.24
  5. Step 5: Solve for x
    x = 59,355,091,988.24/280,607.52
  6. Step 6: Final answer
    x = 211,523.53

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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.