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Finding the Fourth Proportional to 369,313.25, 509,691.45 and 216,479.84

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Solution

The fourth proportional to 369,313.25, 509,691.45 and 216,479.84 is: 298,765.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    369,313.25 : 509,691.45 = 216,479.84 : x
  2. Step 2: Convert to fraction form
    369,313.25/509,691.45 = 216,479.84/x
  3. Step 3: Cross multiply
    369,313.25x = 509,691.45 × 216,479.84
  4. Step 4: Simplify right side
    369,313.25x = 110,337,920,996.91
  5. Step 5: Solve for x
    x = 110,337,920,996.91/369,313.25
  6. Step 6: Final answer
    x = 298,765.13

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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.