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Finding the Fourth Proportional to 1,409,787.59, 1,945,510.45 and 765,207.81

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Solution

The fourth proportional to 1,409,787.59, 1,945,510.45 and 765,207.81 is: 1,055,988.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,409,787.59 : 1,945,510.45 = 765,207.81 : x
  2. Step 2: Convert to fraction form
    1,409,787.59/1,945,510.45 = 765,207.81/x
  3. Step 3: Cross multiply
    1,409,787.59x = 1,945,510.45 × 765,207.81
  4. Step 4: Simplify right side
    1,409,787.59x = 1,488,719,788,863.60
  5. Step 5: Solve for x
    x = 1,488,719,788,863.60/1,409,787.59
  6. Step 6: Final answer
    x = 1,055,988.72

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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.