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Finding the Fourth Proportional to 978,021.72, 1,349,669.04 and 548,301.96

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Solution

The fourth proportional to 978,021.72, 1,349,669.04 and 548,301.96 is: 756,656.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,021.72 : 1,349,669.04 = 548,301.96 : x
  2. Step 2: Convert to fraction form
    978,021.72/1,349,669.04 = 548,301.96/x
  3. Step 3: Cross multiply
    978,021.72x = 1,349,669.04 × 548,301.96
  4. Step 4: Simplify right side
    978,021.72x = 740,026,179,983.32
  5. Step 5: Solve for x
    x = 740,026,179,983.32/978,021.72
  6. Step 6: Final answer
    x = 756,656.18

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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.