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Finding the Fourth Proportional to 489,427.72, 734,140.14 and 134,442.10

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Solution

The fourth proportional to 489,427.72, 734,140.14 and 134,442.10 is: 201,662.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,427.72 : 734,140.14 = 134,442.10 : x
  2. Step 2: Convert to fraction form
    489,427.72/734,140.14 = 134,442.10/x
  3. Step 3: Cross multiply
    489,427.72x = 734,140.14 × 134,442.10
  4. Step 4: Simplify right side
    489,427.72x = 98,699,342,115.89
  5. Step 5: Solve for x
    x = 98,699,342,115.89/489,427.72
  6. Step 6: Final answer
    x = 201,662.75

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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.