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Finding the Fourth Proportional to 865,388, 1,193,459.64 and 720,673.04

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Solution

The fourth proportional to 865,388, 1,193,459.64 and 720,673.04 is: 993,882.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,388 : 1,193,459.64 = 720,673.04 : x
  2. Step 2: Convert to fraction form
    865,388/1,193,459.64 = 720,673.04/x
  3. Step 3: Cross multiply
    865,388x = 1,193,459.64 × 720,673.04
  4. Step 4: Simplify right side
    865,388x = 860,094,186,876.11
  5. Step 5: Solve for x
    x = 860,094,186,876.11/865,388
  6. Step 6: Final answer
    x = 993,882.73

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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.