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Finding the Fourth Proportional to 315,062.40, 472,636.80 and 104,678.40

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Solution

The fourth proportional to 315,062.40, 472,636.80 and 104,678.40 is: 157,031.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,062.40 : 472,636.80 = 104,678.40 : x
  2. Step 2: Convert to fraction form
    315,062.40/472,636.80 = 104,678.40/x
  3. Step 3: Cross multiply
    315,062.40x = 472,636.80 × 104,678.40
  4. Step 4: Simplify right side
    315,062.40x = 49,474,864,005.12
  5. Step 5: Solve for x
    x = 49,474,864,005.12/315,062.40
  6. Step 6: Final answer
    x = 157,031.95

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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.