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Finding the Fourth Proportional to 660,845.40, 991,268.10 and 626,728.20

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Solution

The fourth proportional to 660,845.40, 991,268.10 and 626,728.20 is: 940,092.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,845.40 : 991,268.10 = 626,728.20 : x
  2. Step 2: Convert to fraction form
    660,845.40/991,268.10 = 626,728.20/x
  3. Step 3: Cross multiply
    660,845.40x = 991,268.10 × 626,728.20
  4. Step 4: Simplify right side
    660,845.40x = 621,255,672,030.42
  5. Step 5: Solve for x
    x = 621,255,672,030.42/660,845.40
  6. Step 6: Final answer
    x = 940,092.30

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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.