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Finding the Fourth Proportional to 660,791.40, 991,187.10 and 626,674.20

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Solution

The fourth proportional to 660,791.40, 991,187.10 and 626,674.20 is: 940,011.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,791.40 : 991,187.10 = 626,674.20 : x
  2. Step 2: Convert to fraction form
    660,791.40/991,187.10 = 626,674.20/x
  3. Step 3: Cross multiply
    660,791.40x = 991,187.10 × 626,674.20
  4. Step 4: Simplify right side
    660,791.40x = 621,151,382,942.82
  5. Step 5: Solve for x
    x = 621,151,382,942.82/660,791.40
  6. Step 6: Final answer
    x = 940,011.30

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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.