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Finding the Fourth Proportional to 613,008.18, 918,316.71 and 345,960.90

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Solution

The fourth proportional to 613,008.18, 918,316.71 and 345,960.90 is: 518,266.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,008.18 : 918,316.71 = 345,960.90 : x
  2. Step 2: Convert to fraction form
    613,008.18/918,316.71 = 345,960.90/x
  3. Step 3: Cross multiply
    613,008.18x = 918,316.71 × 345,960.90
  4. Step 4: Simplify right side
    613,008.18x = 317,701,675,476.64
  5. Step 5: Solve for x
    x = 317,701,675,476.64/613,008.18
  6. Step 6: Final answer
    x = 518,266.62

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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.