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Finding the Fourth Proportional to 680,146.80, 1,020,220.20 and 647,487.60

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Solution

The fourth proportional to 680,146.80, 1,020,220.20 and 647,487.60 is: 971,231.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,146.80 : 1,020,220.20 = 647,487.60 : x
  2. Step 2: Convert to fraction form
    680,146.80/1,020,220.20 = 647,487.60/x
  3. Step 3: Cross multiply
    680,146.80x = 1,020,220.20 × 647,487.60
  4. Step 4: Simplify right side
    680,146.80x = 660,579,928,769.52
  5. Step 5: Solve for x
    x = 660,579,928,769.52/680,146.80
  6. Step 6: Final answer
    x = 971,231.40

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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.