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Finding the Fourth Proportional to 561,335.20, 842,002.80 and 384,188.20

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Solution

The fourth proportional to 561,335.20, 842,002.80 and 384,188.20 is: 576,282.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,335.20 : 842,002.80 = 384,188.20 : x
  2. Step 2: Convert to fraction form
    561,335.20/842,002.80 = 384,188.20/x
  3. Step 3: Cross multiply
    561,335.20x = 842,002.80 × 384,188.20
  4. Step 4: Simplify right side
    561,335.20x = 323,487,540,126.96
  5. Step 5: Solve for x
    x = 323,487,540,126.96/561,335.20
  6. Step 6: Final answer
    x = 576,282.30

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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.