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Finding the Fourth Proportional to 978,005.31, 1,349,712.11 and 548,313.27

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Solution

The fourth proportional to 978,005.31, 1,349,712.11 and 548,313.27 is: 756,708.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,005.31 : 1,349,712.11 = 548,313.27 : x
  2. Step 2: Convert to fraction form
    978,005.31/1,349,712.11 = 548,313.27/x
  3. Step 3: Cross multiply
    978,005.31x = 1,349,712.11 × 548,313.27
  4. Step 4: Simplify right side
    978,005.31x = 740,065,057,851.13
  5. Step 5: Solve for x
    x = 740,065,057,851.13/978,005.31
  6. Step 6: Final answer
    x = 756,708.63

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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.