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Finding the Fourth Proportional to 280,560.68, 387,175.80 and 153,236.28

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Solution

The fourth proportional to 280,560.68, 387,175.80 and 153,236.28 is: 211,467.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,560.68 : 387,175.80 = 153,236.28 : x
  2. Step 2: Convert to fraction form
    280,560.68/387,175.80 = 153,236.28/x
  3. Step 3: Cross multiply
    280,560.68x = 387,175.80 × 153,236.28
  4. Step 4: Simplify right side
    280,560.68x = 59,329,379,298.02
  5. Step 5: Solve for x
    x = 59,329,379,298.02/280,560.68
  6. Step 6: Final answer
    x = 211,467.19

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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.