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Finding the Fourth Proportional to 668,260.60, 1,002,390.90 and 491,113.60

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Solution

The fourth proportional to 668,260.60, 1,002,390.90 and 491,113.60 is: 736,670.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,260.60 : 1,002,390.90 = 491,113.60 : x
  2. Step 2: Convert to fraction form
    668,260.60/1,002,390.90 = 491,113.60/x
  3. Step 3: Cross multiply
    668,260.60x = 1,002,390.90 × 491,113.60
  4. Step 4: Simplify right side
    668,260.60x = 492,287,803,506.24
  5. Step 5: Solve for x
    x = 492,287,803,506.24/668,260.60
  6. Step 6: Final answer
    x = 736,670.40

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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.