Home / 747,813.90-1,121,720.85-665,145.30

Finding the Fourth Proportional to 747,813.90, 1,121,720.85 and 665,145.30

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Solution

The fourth proportional to 747,813.90, 1,121,720.85 and 665,145.30 is: 997,717.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    747,813.90 : 1,121,720.85 = 665,145.30 : x
  2. Step 2: Convert to fraction form
    747,813.90/1,121,720.85 = 665,145.30/x
  3. Step 3: Cross multiply
    747,813.90x = 1,121,720.85 × 665,145.30
  4. Step 4: Simplify right side
    747,813.90x = 746,107,351,289.51
  5. Step 5: Solve for x
    x = 746,107,351,289.51/747,813.90
  6. Step 6: Final answer
    x = 997,717.95

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Double scale
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Similar ratio
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1.5x scale

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.