Home / 1,287,931.60-1,930,342.20-656,520.40

Finding the Fourth Proportional to 1,287,931.60, 1,930,342.20 and 656,520.40

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Solution

The fourth proportional to 1,287,931.60, 1,930,342.20 and 656,520.40 is: 983,987.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,931.60 : 1,930,342.20 = 656,520.40 : x
  2. Step 2: Convert to fraction form
    1,287,931.60/1,930,342.20 = 656,520.40/x
  3. Step 3: Cross multiply
    1,287,931.60x = 1,930,342.20 × 656,520.40
  4. Step 4: Simplify right side
    1,287,931.60x = 1,267,309,033,280.88
  5. Step 5: Solve for x
    x = 1,267,309,033,280.88/1,287,931.60
  6. Step 6: Final answer
    x = 983,987.84

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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.