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Finding the Fourth Proportional to 280,687.59, 387,344.35 and 153,360.45

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Solution

The fourth proportional to 280,687.59, 387,344.35 and 153,360.45 is: 211,634.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,687.59 : 387,344.35 = 153,360.45 : x
  2. Step 2: Convert to fraction form
    280,687.59/387,344.35 = 153,360.45/x
  3. Step 3: Cross multiply
    280,687.59x = 387,344.35 × 153,360.45
  4. Step 4: Simplify right side
    280,687.59x = 59,403,303,820.96
  5. Step 5: Solve for x
    x = 59,403,303,820.96/280,687.59
  6. Step 6: Final answer
    x = 211,634.95

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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.