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Finding the Fourth Proportional to 851,391.64, 1,174,970.10 and 488,816.20

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Solution

The fourth proportional to 851,391.64, 1,174,970.10 and 488,816.20 is: 674,594.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    851,391.64 : 1,174,970.10 = 488,816.20 : x
  2. Step 2: Convert to fraction form
    851,391.64/1,174,970.10 = 488,816.20/x
  3. Step 3: Cross multiply
    851,391.64x = 1,174,970.10 × 488,816.20
  4. Step 4: Simplify right side
    851,391.64x = 574,344,419,395.62
  5. Step 5: Solve for x
    x = 574,344,419,395.62/851,391.64
  6. Step 6: Final answer
    x = 674,594.85

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.