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Finding the Fourth Proportional to 611,727.20, 917,590.80 and 422,770.40

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Solution

The fourth proportional to 611,727.20, 917,590.80 and 422,770.40 is: 634,155.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,727.20 : 917,590.80 = 422,770.40 : x
  2. Step 2: Convert to fraction form
    611,727.20/917,590.80 = 422,770.40/x
  3. Step 3: Cross multiply
    611,727.20x = 917,590.80 × 422,770.40
  4. Step 4: Simplify right side
    611,727.20x = 387,930,229,552.32
  5. Step 5: Solve for x
    x = 387,930,229,552.32/611,727.20
  6. Step 6: Final answer
    x = 634,155.60

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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.