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Finding the Fourth Proportional to 667,263.65, 920,974.73 and 521,781.57

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Solution

The fourth proportional to 667,263.65, 920,974.73 and 521,781.57 is: 720,176.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,263.65 : 920,974.73 = 521,781.57 : x
  2. Step 2: Convert to fraction form
    667,263.65/920,974.73 = 521,781.57/x
  3. Step 3: Cross multiply
    667,263.65x = 920,974.73 × 521,781.57
  4. Step 4: Simplify right side
    667,263.65x = 480,547,637,940.82
  5. Step 5: Solve for x
    x = 480,547,637,940.82/667,263.65
  6. Step 6: Final answer
    x = 720,176.56

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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.