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Finding the Fourth Proportional to 326,966.80, 490,085.70 and 127,220.80

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Solution

The fourth proportional to 326,966.80, 490,085.70 and 127,220.80 is: 190,689.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,966.80 : 490,085.70 = 127,220.80 : x
  2. Step 2: Convert to fraction form
    326,966.80/490,085.70 = 127,220.80/x
  3. Step 3: Cross multiply
    326,966.80x = 490,085.70 × 127,220.80
  4. Step 4: Simplify right side
    326,966.80x = 62,349,094,822.56
  5. Step 5: Solve for x
    x = 62,349,094,822.56/326,966.80
  6. Step 6: Final answer
    x = 190,689.38

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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.