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Finding the Fourth Proportional to 912,520, 1,368,780 and 247,672

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Solution

The fourth proportional to 912,520, 1,368,780 and 247,672 is: 371,508

Step by Step Solution

  1. Step 1: Write the proportion equation
    912,520 : 1,368,780 = 247,672 : x
  2. Step 2: Convert to fraction form
    912,520/1,368,780 = 247,672/x
  3. Step 3: Cross multiply
    912,520x = 1,368,780 × 247,672
  4. Step 4: Simplify right side
    912,520x = 339,008,480,160
  5. Step 5: Solve for x
    x = 339,008,480,160/912,520
  6. Step 6: Final answer
    x = 371,508

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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.