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Finding the Fourth Proportional to 861,502.84, 1,188,873.78 and 479,521.48

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Solution

The fourth proportional to 861,502.84, 1,188,873.78 and 479,521.48 is: 661,739.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,502.84 : 1,188,873.78 = 479,521.48 : x
  2. Step 2: Convert to fraction form
    861,502.84/1,188,873.78 = 479,521.48/x
  3. Step 3: Cross multiply
    861,502.84x = 1,188,873.78 × 479,521.48
  4. Step 4: Simplify right side
    861,502.84x = 570,090,514,518.79
  5. Step 5: Solve for x
    x = 570,090,514,518.79/861,502.84
  6. Step 6: Final answer
    x = 661,739.56

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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.