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Finding the Fourth Proportional to 310,057.80, 465,086.70 and 257,569.80

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Solution

The fourth proportional to 310,057.80, 465,086.70 and 257,569.80 is: 386,354.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,057.80 : 465,086.70 = 257,569.80 : x
  2. Step 2: Convert to fraction form
    310,057.80/465,086.70 = 257,569.80/x
  3. Step 3: Cross multiply
    310,057.80x = 465,086.70 × 257,569.80
  4. Step 4: Simplify right side
    310,057.80x = 119,792,288,301.66
  5. Step 5: Solve for x
    x = 119,792,288,301.66/310,057.80
  6. Step 6: Final answer
    x = 386,354.70

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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.