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Finding the Fourth Proportional to 636,347.81, 878,107.70 and 374,661.51

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Solution

The fourth proportional to 636,347.81, 878,107.70 and 374,661.51 is: 517,002.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,347.81 : 878,107.70 = 374,661.51 : x
  2. Step 2: Convert to fraction form
    636,347.81/878,107.70 = 374,661.51/x
  3. Step 3: Cross multiply
    636,347.81x = 878,107.70 × 374,661.51
  4. Step 4: Simplify right side
    636,347.81x = 328,993,154,951.32
  5. Step 5: Solve for x
    x = 328,993,154,951.32/636,347.81
  6. Step 6: Final answer
    x = 517,002.11

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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.