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Finding the Fourth Proportional to 1,313,793.90, 1,971,468.45 and 865,809.90

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Solution

The fourth proportional to 1,313,793.90, 1,971,468.45 and 865,809.90 is: 1,299,227.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,313,793.90 : 1,971,468.45 = 865,809.90 : x
  2. Step 2: Convert to fraction form
    1,313,793.90/1,971,468.45 = 865,809.90/x
  3. Step 3: Cross multiply
    1,313,793.90x = 1,971,468.45 × 865,809.90
  4. Step 4: Simplify right side
    1,313,793.90x = 1,706,916,901,547.66
  5. Step 5: Solve for x
    x = 1,706,916,901,547.66/1,313,793.90
  6. Step 6: Final answer
    x = 1,299,227.30

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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.