Home / 1,375,417.20-2,063,125.80-428,780.40

Finding the Fourth Proportional to 1,375,417.20, 2,063,125.80 and 428,780.40

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Solution

The fourth proportional to 1,375,417.20, 2,063,125.80 and 428,780.40 is: 643,170.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,375,417.20 : 2,063,125.80 = 428,780.40 : x
  2. Step 2: Convert to fraction form
    1,375,417.20/2,063,125.80 = 428,780.40/x
  3. Step 3: Cross multiply
    1,375,417.20x = 2,063,125.80 × 428,780.40
  4. Step 4: Simplify right side
    1,375,417.20x = 884,627,905,774.32
  5. Step 5: Solve for x
    x = 884,627,905,774.32/1,375,417.20
  6. Step 6: Final answer
    x = 643,170.60

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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.