Home / 2,128,643.40-3,193,839.90-781,451.40

Finding the Fourth Proportional to 2,128,643.40, 3,193,839.90 and 781,451.40

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Solution

The fourth proportional to 2,128,643.40, 3,193,839.90 and 781,451.40 is: 1,172,498.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128,643.40 : 3,193,839.90 = 781,451.40 : x
  2. Step 2: Convert to fraction form
    2,128,643.40/3,193,839.90 = 781,451.40/x
  3. Step 3: Cross multiply
    2,128,643.40x = 3,193,839.90 × 781,451.40
  4. Step 4: Simplify right side
    2,128,643.40x = 2,495,830,661,230.86
  5. Step 5: Solve for x
    x = 2,495,830,661,230.86/2,128,643.40
  6. Step 6: Final answer
    x = 1,172,498.25

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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.