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Finding the Fourth Proportional to 612,603.48, 918,305.30 and 342,863.36

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Solution

The fourth proportional to 612,603.48, 918,305.30 and 342,863.36 is: 513,959.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,603.48 : 918,305.30 = 342,863.36 : x
  2. Step 2: Convert to fraction form
    612,603.48/918,305.30 = 342,863.36/x
  3. Step 3: Cross multiply
    612,603.48x = 918,305.30 × 342,863.36
  4. Step 4: Simplify right side
    612,603.48x = 314,853,234,357.97
  5. Step 5: Solve for x
    x = 314,853,234,357.97/612,603.48
  6. Step 6: Final answer
    x = 513,959.27

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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.