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Finding the Fourth Proportional to 319,726.80, 477,111.78 and 264,430.80

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Solution

The fourth proportional to 319,726.80, 477,111.78 and 264,430.80 is: 394,596.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,726.80 : 477,111.78 = 264,430.80 : x
  2. Step 2: Convert to fraction form
    319,726.80/477,111.78 = 264,430.80/x
  3. Step 3: Cross multiply
    319,726.80x = 477,111.78 × 264,430.80
  4. Step 4: Simplify right side
    319,726.80x = 126,163,049,674.82
  5. Step 5: Solve for x
    x = 126,163,049,674.82/319,726.80
  6. Step 6: Final answer
    x = 394,596.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.