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Finding the Fourth Proportional to 666,777.82, 920,154.50 and 360,854.47

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Solution

The fourth proportional to 666,777.82, 920,154.50 and 360,854.47 is: 497,979.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,777.82 : 920,154.50 = 360,854.47 : x
  2. Step 2: Convert to fraction form
    666,777.82/920,154.50 = 360,854.47/x
  3. Step 3: Cross multiply
    666,777.82x = 920,154.50 × 360,854.47
  4. Step 4: Simplify right side
    666,777.82x = 332,041,863,017.37
  5. Step 5: Solve for x
    x = 332,041,863,017.37/666,777.82
  6. Step 6: Final answer
    x = 497,979.77

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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.