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Finding the Fourth Proportional to 561,934.80, 842,902.20 and 390,692.70

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Solution

The fourth proportional to 561,934.80, 842,902.20 and 390,692.70 is: 586,039.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,934.80 : 842,902.20 = 390,692.70 : x
  2. Step 2: Convert to fraction form
    561,934.80/842,902.20 = 390,692.70/x
  3. Step 3: Cross multiply
    561,934.80x = 842,902.20 × 390,692.70
  4. Step 4: Simplify right side
    561,934.80x = 329,315,736,353.94
  5. Step 5: Solve for x
    x = 329,315,736,353.94/561,934.80
  6. Step 6: Final answer
    x = 586,039.05

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Similar ratio
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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.