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Finding the Fourth Proportional to 280,425.75, 386,985.53 and 153,101.34

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Solution

The fourth proportional to 280,425.75, 386,985.53 and 153,101.34 is: 211,278.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,425.75 : 386,985.53 = 153,101.34 : x
  2. Step 2: Convert to fraction form
    280,425.75/386,985.53 = 153,101.34/x
  3. Step 3: Cross multiply
    280,425.75x = 386,985.53 × 153,101.34
  4. Step 4: Simplify right side
    280,425.75x = 59,248,003,203.61
  5. Step 5: Solve for x
    x = 59,248,003,203.61/280,425.75
  6. Step 6: Final answer
    x = 211,278.76

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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.