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Finding the Fourth Proportional to 458,215.87, 687,386.28 and 266,180.53

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Solution

The fourth proportional to 458,215.87, 687,386.28 and 266,180.53 is: 399,307.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,215.87 : 687,386.28 = 266,180.53 : x
  2. Step 2: Convert to fraction form
    458,215.87/687,386.28 = 266,180.53/x
  3. Step 3: Cross multiply
    458,215.87x = 687,386.28 × 266,180.53
  4. Step 4: Simplify right side
    458,215.87x = 182,968,844,325.13
  5. Step 5: Solve for x
    x = 182,968,844,325.13/458,215.87
  6. Step 6: Final answer
    x = 399,307.09

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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.