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Finding the Fourth Proportional to 316,073.69, 435,808.99 and 255,456.89

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Solution

The fourth proportional to 316,073.69, 435,808.99 and 255,456.89 is: 352,229.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,073.69 : 435,808.99 = 255,456.89 : x
  2. Step 2: Convert to fraction form
    316,073.69/435,808.99 = 255,456.89/x
  3. Step 3: Cross multiply
    316,073.69x = 435,808.99 × 255,456.89
  4. Step 4: Simplify right side
    316,073.69x = 111,330,407,040.40
  5. Step 5: Solve for x
    x = 111,330,407,040.40/316,073.69
  6. Step 6: Final answer
    x = 352,229.28

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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.