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Finding the Fourth Proportional to 755,478.80, 1,133,218.12 and 256,842.80

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Solution

The fourth proportional to 755,478.80, 1,133,218.12 and 256,842.80 is: 385,264.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    755,478.80 : 1,133,218.12 = 256,842.80 : x
  2. Step 2: Convert to fraction form
    755,478.80/1,133,218.12 = 256,842.80/x
  3. Step 3: Cross multiply
    755,478.80x = 1,133,218.12 × 256,842.80
  4. Step 4: Simplify right side
    755,478.80x = 291,058,914,951.54
  5. Step 5: Solve for x
    x = 291,058,914,951.54/755,478.80
  6. Step 6: Final answer
    x = 385,264.17

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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.