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Finding the Fourth Proportional to 605,622.30, 907,449.30 and 520,985.40

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Solution

The fourth proportional to 605,622.30, 907,449.30 and 520,985.40 is: 780,631.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,622.30 : 907,449.30 = 520,985.40 : x
  2. Step 2: Convert to fraction form
    605,622.30/907,449.30 = 520,985.40/x
  3. Step 3: Cross multiply
    605,622.30x = 907,449.30 × 520,985.40
  4. Step 4: Simplify right side
    605,622.30x = 472,767,836,540.22
  5. Step 5: Solve for x
    x = 472,767,836,540.22/605,622.30
  6. Step 6: Final answer
    x = 780,631.49

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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.