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Finding the Fourth Proportional to 321,430.71, 480,726.95 and 194,720.79

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Solution

The fourth proportional to 321,430.71, 480,726.95 and 194,720.79 is: 291,221.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,430.71 : 480,726.95 = 194,720.79 : x
  2. Step 2: Convert to fraction form
    321,430.71/480,726.95 = 194,720.79/x
  3. Step 3: Cross multiply
    321,430.71x = 480,726.95 × 194,720.79
  4. Step 4: Simplify right side
    321,430.71x = 93,607,530,504.69
  5. Step 5: Solve for x
    x = 93,607,530,504.69/321,430.71
  6. Step 6: Final answer
    x = 291,221.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.