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Finding the Fourth Proportional to 398,320.20, 597,480.30 and 256,602.60

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Solution

The fourth proportional to 398,320.20, 597,480.30 and 256,602.60 is: 384,903.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,320.20 : 597,480.30 = 256,602.60 : x
  2. Step 2: Convert to fraction form
    398,320.20/597,480.30 = 256,602.60/x
  3. Step 3: Cross multiply
    398,320.20x = 597,480.30 × 256,602.60
  4. Step 4: Simplify right side
    398,320.20x = 153,314,998,428.78
  5. Step 5: Solve for x
    x = 153,314,998,428.78/398,320.20
  6. Step 6: Final answer
    x = 384,903.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.