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Finding the Fourth Proportional to 605,615.80, 907,439.55 and 520,978.90

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Solution

The fourth proportional to 605,615.80, 907,439.55 and 520,978.90 is: 780,621.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,615.80 : 907,439.55 = 520,978.90 : x
  2. Step 2: Convert to fraction form
    605,615.80/907,439.55 = 520,978.90/x
  3. Step 3: Cross multiply
    605,615.80x = 907,439.55 × 520,978.90
  4. Step 4: Simplify right side
    605,615.80x = 472,756,858,575.50
  5. Step 5: Solve for x
    x = 472,756,858,575.50/605,615.80
  6. Step 6: Final answer
    x = 780,621.74

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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.