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Finding the Fourth Proportional to 280,687.68, 387,607.68 and 180,260.64

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Solution

The fourth proportional to 280,687.68, 387,607.68 and 180,260.64 is: 248,925.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,687.68 : 387,607.68 = 180,260.64 : x
  2. Step 2: Convert to fraction form
    280,687.68/387,607.68 = 180,260.64/x
  3. Step 3: Cross multiply
    280,687.68x = 387,607.68 × 180,260.64
  4. Step 4: Simplify right side
    280,687.68x = 69,870,408,465.72
  5. Step 5: Solve for x
    x = 69,870,408,465.72/280,687.68
  6. Step 6: Final answer
    x = 248,925.81

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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.