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Finding the Fourth Proportional to 716,245.52, 988,419.29 and 393,980.13

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Solution

The fourth proportional to 716,245.52, 988,419.29 and 393,980.13 is: 543,692.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,245.52 : 988,419.29 = 393,980.13 : x
  2. Step 2: Convert to fraction form
    716,245.52/988,419.29 = 393,980.13/x
  3. Step 3: Cross multiply
    716,245.52x = 988,419.29 × 393,980.13
  4. Step 4: Simplify right side
    716,245.52x = 389,417,558,398.81
  5. Step 5: Solve for x
    x = 389,417,558,398.81/716,245.52
  6. Step 6: Final answer
    x = 543,692.84

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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.