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Finding the Fourth Proportional to 310,311.74, 428,083.71 and 265,471.40

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Solution

The fourth proportional to 310,311.74, 428,083.71 and 265,471.40 is: 366,225.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,311.74 : 428,083.71 = 265,471.40 : x
  2. Step 2: Convert to fraction form
    310,311.74/428,083.71 = 265,471.40/x
  3. Step 3: Cross multiply
    310,311.74x = 428,083.71 × 265,471.40
  4. Step 4: Simplify right side
    310,311.74x = 113,643,981,810.89
  5. Step 5: Solve for x
    x = 113,643,981,810.89/310,311.74
  6. Step 6: Final answer
    x = 366,225.21

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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.