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Finding the Fourth Proportional to 771,230.80, 1,155,463.80 and 660,638.80

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Solution

The fourth proportional to 771,230.80, 1,155,463.80 and 660,638.80 is: 989,774.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    771,230.80 : 1,155,463.80 = 660,638.80 : x
  2. Step 2: Convert to fraction form
    771,230.80/1,155,463.80 = 660,638.80/x
  3. Step 3: Cross multiply
    771,230.80x = 1,155,463.80 × 660,638.80
  4. Step 4: Simplify right side
    771,230.80x = 763,344,218,275.44
  5. Step 5: Solve for x
    x = 763,344,218,275.44/771,230.80
  6. Step 6: Final answer
    x = 989,774.03

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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.