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Finding the Fourth Proportional to 636,346.90, 878,106.77 and 374,660.89

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Solution

The fourth proportional to 636,346.90, 878,106.77 and 374,660.89 is: 517,001.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,346.90 : 878,106.77 = 374,660.89 : x
  2. Step 2: Convert to fraction form
    636,346.90/878,106.77 = 374,660.89/x
  3. Step 3: Cross multiply
    636,346.90x = 878,106.77 × 374,660.89
  4. Step 4: Simplify right side
    636,346.90x = 328,992,267,095.15
  5. Step 5: Solve for x
    x = 328,992,267,095.15/636,346.90
  6. Step 6: Final answer
    x = 517,001.45

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Double scale
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Similar ratio
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1.5x scale

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.