Home / 680,212.80-1,020,319.20-645,998.40

Finding the Fourth Proportional to 680,212.80, 1,020,319.20 and 645,998.40

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Solution

The fourth proportional to 680,212.80, 1,020,319.20 and 645,998.40 is: 968,997.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,212.80 : 1,020,319.20 = 645,998.40 : x
  2. Step 2: Convert to fraction form
    680,212.80/1,020,319.20 = 645,998.40/x
  3. Step 3: Cross multiply
    680,212.80x = 1,020,319.20 × 645,998.40
  4. Step 4: Simplify right side
    680,212.80x = 659,124,570,689.28
  5. Step 5: Solve for x
    x = 659,124,570,689.28/680,212.80
  6. Step 6: Final answer
    x = 968,997.60

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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.