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Finding the Fourth Proportional to 868,000.65, 1,212,401.55 and 868,000.65

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Solution

The fourth proportional to 868,000.65, 1,212,401.55 and 868,000.65 is: 1,212,401.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    868,000.65 : 1,212,401.55 = 868,000.65 : x
  2. Step 2: Convert to fraction form
    868,000.65/1,212,401.55 = 868,000.65/x
  3. Step 3: Cross multiply
    868,000.65x = 1,212,401.55 × 868,000.65
  4. Step 4: Simplify right side
    868,000.65x = 1,052,365,333,461.01
  5. Step 5: Solve for x
    x = 1,052,365,333,461.01/868,000.65
  6. Step 6: Final answer
    x = 1,212,401.55

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.