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Finding the Fourth Proportional to 519,291.12, 716,621.52 and 280,827.12

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Solution

The fourth proportional to 519,291.12, 716,621.52 and 280,827.12 is: 387,541.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,291.12 : 716,621.52 = 280,827.12 : x
  2. Step 2: Convert to fraction form
    519,291.12/716,621.52 = 280,827.12/x
  3. Step 3: Cross multiply
    519,291.12x = 716,621.52 × 280,827.12
  4. Step 4: Simplify right side
    519,291.12x = 201,246,757,591.62
  5. Step 5: Solve for x
    x = 201,246,757,591.62/519,291.12
  6. Step 6: Final answer
    x = 387,541.30

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Double scale
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Similar ratio
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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.