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Finding the Fourth Proportional to 716,260.31, 988,418.39 and 393,970.32

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Solution

The fourth proportional to 716,260.31, 988,418.39 and 393,970.32 is: 543,667.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,260.31 : 988,418.39 = 393,970.32 : x
  2. Step 2: Convert to fraction form
    716,260.31/988,418.39 = 393,970.32/x
  3. Step 3: Cross multiply
    716,260.31x = 988,418.39 × 393,970.32
  4. Step 4: Simplify right side
    716,260.31x = 389,407,507,432.33
  5. Step 5: Solve for x
    x = 389,407,507,432.33/716,260.31
  6. Step 6: Final answer
    x = 543,667.58

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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.