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Finding the Fourth Proportional to 658,316.34, 987,373.40 and 208,978.83

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Solution

The fourth proportional to 658,316.34, 987,373.40 and 208,978.83 is: 313,436.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,316.34 : 987,373.40 = 208,978.83 : x
  2. Step 2: Convert to fraction form
    658,316.34/987,373.40 = 208,978.83/x
  3. Step 3: Cross multiply
    658,316.34x = 987,373.40 × 208,978.83
  4. Step 4: Simplify right side
    658,316.34x = 206,340,136,860.23
  5. Step 5: Solve for x
    x = 206,340,136,860.23/658,316.34
  6. Step 6: Final answer
    x = 313,436.15

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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.