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Finding the Fourth Proportional to 666,778.82, 920,155.88 and 360,855.47

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Solution

The fourth proportional to 666,778.82, 920,155.88 and 360,855.47 is: 497,981.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,778.82 : 920,155.88 = 360,855.47 : x
  2. Step 2: Convert to fraction form
    666,778.82/920,155.88 = 360,855.47/x
  3. Step 3: Cross multiply
    666,778.82x = 920,155.88 × 360,855.47
  4. Step 4: Simplify right side
    666,778.82x = 332,043,282,550.66
  5. Step 5: Solve for x
    x = 332,043,282,550.66/666,778.82
  6. Step 6: Final answer
    x = 497,981.15

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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.