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Finding the Fourth Proportional to 389,718.72, 584,604.48 and 136,968.48

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Solution

The fourth proportional to 389,718.72, 584,604.48 and 136,968.48 is: 205,462.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,718.72 : 584,604.48 = 136,968.48 : x
  2. Step 2: Convert to fraction form
    389,718.72/584,604.48 = 136,968.48/x
  3. Step 3: Cross multiply
    389,718.72x = 584,604.48 × 136,968.48
  4. Step 4: Simplify right side
    389,718.72x = 80,072,387,026.79
  5. Step 5: Solve for x
    x = 80,072,387,026.79/389,718.72
  6. Step 6: Final answer
    x = 205,462.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.