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Finding the Fourth Proportional to 715,996.80, 988,070.40 and 410,140.80

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Solution

The fourth proportional to 715,996.80, 988,070.40 and 410,140.80 is: 565,991.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,996.80 : 988,070.40 = 410,140.80 : x
  2. Step 2: Convert to fraction form
    715,996.80/988,070.40 = 410,140.80/x
  3. Step 3: Cross multiply
    715,996.80x = 988,070.40 × 410,140.80
  4. Step 4: Simplify right side
    715,996.80x = 405,247,984,312.32
  5. Step 5: Solve for x
    x = 405,247,984,312.32/715,996.80
  6. Step 6: Final answer
    x = 565,991.33

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.