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Finding the Fourth Proportional to 679,989.90, 1,019,978.72 and 253,511.22

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Solution

The fourth proportional to 679,989.90, 1,019,978.72 and 253,511.22 is: 380,264.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,989.90 : 1,019,978.72 = 253,511.22 : x
  2. Step 2: Convert to fraction form
    679,989.90/1,019,978.72 = 253,511.22/x
  3. Step 3: Cross multiply
    679,989.90x = 1,019,978.72 × 253,511.22
  4. Step 4: Simplify right side
    679,989.90x = 258,576,049,681.24
  5. Step 5: Solve for x
    x = 258,576,049,681.24/679,989.90
  6. Step 6: Final answer
    x = 380,264.54

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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.