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Finding the Fourth Proportional to 280,039.68, 386,460.72 and 157,528.80

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Solution

The fourth proportional to 280,039.68, 386,460.72 and 157,528.80 is: 217,393.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,039.68 : 386,460.72 = 157,528.80 : x
  2. Step 2: Convert to fraction form
    280,039.68/386,460.72 = 157,528.80/x
  3. Step 3: Cross multiply
    280,039.68x = 386,460.72 × 157,528.80
  4. Step 4: Simplify right side
    280,039.68x = 60,878,693,468.74
  5. Step 5: Solve for x
    x = 60,878,693,468.74/280,039.68
  6. Step 6: Final answer
    x = 217,393.10

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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.