Home / 680,172.71-1,020,390.28-380,991.11

Finding the Fourth Proportional to 680,172.71, 1,020,390.28 and 380,991.11

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Solution

The fourth proportional to 680,172.71, 1,020,390.28 and 380,991.11 is: 571,560.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,172.71 : 1,020,390.28 = 380,991.11 : x
  2. Step 2: Convert to fraction form
    680,172.71/1,020,390.28 = 380,991.11/x
  3. Step 3: Cross multiply
    680,172.71x = 1,020,390.28 × 380,991.11
  4. Step 4: Simplify right side
    680,172.71x = 388,759,619,355.98
  5. Step 5: Solve for x
    x = 388,759,619,355.98/680,172.71
  6. Step 6: Final answer
    x = 571,560.16

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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.