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Finding the Fourth Proportional to 636,346.77, 878,106.60 and 374,660.77

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Solution

The fourth proportional to 636,346.77, 878,106.60 and 374,660.77 is: 517,001.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,346.77 : 878,106.60 = 374,660.77 : x
  2. Step 2: Convert to fraction form
    636,346.77/878,106.60 = 374,660.77/x
  3. Step 3: Cross multiply
    636,346.77x = 878,106.60 × 374,660.77
  4. Step 4: Simplify right side
    636,346.77x = 328,992,092,702.82
  5. Step 5: Solve for x
    x = 328,992,092,702.82/636,346.77
  6. Step 6: Final answer
    x = 517,001.28

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Double scale
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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.