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Finding the Fourth Proportional to 280,399.80, 386,957.58 and 153,080.76

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Solution

The fourth proportional to 280,399.80, 386,957.58 and 153,080.76 is: 211,254.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,399.80 : 386,957.58 = 153,080.76 : x
  2. Step 2: Convert to fraction form
    280,399.80/386,957.58 = 153,080.76/x
  3. Step 3: Cross multiply
    280,399.80x = 386,957.58 × 153,080.76
  4. Step 4: Simplify right side
    280,399.80x = 59,235,760,434.16
  5. Step 5: Solve for x
    x = 59,235,760,434.16/280,399.80
  6. Step 6: Final answer
    x = 211,254.65

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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.