Home / 1,218,120.71-1,680,620.13-708,724.67

Finding the Fourth Proportional to 1,218,120.71, 1,680,620.13 and 708,724.67

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Solution

The fourth proportional to 1,218,120.71, 1,680,620.13 and 708,724.67 is: 977,815.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218,120.71 : 1,680,620.13 = 708,724.67 : x
  2. Step 2: Convert to fraction form
    1,218,120.71/1,680,620.13 = 708,724.67/x
  3. Step 3: Cross multiply
    1,218,120.71x = 1,680,620.13 × 708,724.67
  4. Step 4: Simplify right side
    1,218,120.71x = 1,191,096,938,626.51
  5. Step 5: Solve for x
    x = 1,191,096,938,626.51/1,218,120.71
  6. Step 6: Final answer
    x = 977,815.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.