Home / 991,190.45-1,367,870.85-561,470.45

Finding the Fourth Proportional to 991,190.45, 1,367,870.85 and 561,470.45

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Solution

The fourth proportional to 991,190.45, 1,367,870.85 and 561,470.45 is: 774,845.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,190.45 : 1,367,870.85 = 561,470.45 : x
  2. Step 2: Convert to fraction form
    991,190.45/1,367,870.85 = 561,470.45/x
  3. Step 3: Cross multiply
    991,190.45x = 1,367,870.85 × 561,470.45
  4. Step 4: Simplify right side
    991,190.45x = 768,019,061,691.38
  5. Step 5: Solve for x
    x = 768,019,061,691.38/991,190.45
  6. Step 6: Final answer
    x = 774,845.10

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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.