Home / 1,145,120.40-1,716,211.80-639,680.40

Finding the Fourth Proportional to 1,145,120.40, 1,716,211.80 and 639,680.40

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Solution

The fourth proportional to 1,145,120.40, 1,716,211.80 and 639,680.40 is: 958,700.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,145,120.40 : 1,716,211.80 = 639,680.40 : x
  2. Step 2: Convert to fraction form
    1,145,120.40/1,716,211.80 = 639,680.40/x
  3. Step 3: Cross multiply
    1,145,120.40x = 1,716,211.80 × 639,680.40
  4. Step 4: Simplify right side
    1,145,120.40x = 1,097,827,050,708.72
  5. Step 5: Solve for x
    x = 1,097,827,050,708.72/1,145,120.40
  6. Step 6: Final answer
    x = 958,700.11

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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.