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Finding the Fourth Proportional to 707,930.66, 976,939.30 and 385,639.76

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Solution

The fourth proportional to 707,930.66, 976,939.30 and 385,639.76 is: 532,180.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,930.66 : 976,939.30 = 385,639.76 : x
  2. Step 2: Convert to fraction form
    707,930.66/976,939.30 = 385,639.76/x
  3. Step 3: Cross multiply
    707,930.66x = 976,939.30 × 385,639.76
  4. Step 4: Simplify right side
    707,930.66x = 376,746,637,186.57
  5. Step 5: Solve for x
    x = 376,746,637,186.57/707,930.66
  6. Step 6: Final answer
    x = 532,180.14

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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.