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Finding the Fourth Proportional to 489,426.72, 734,138.64 and 134,441.10

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Solution

The fourth proportional to 489,426.72, 734,138.64 and 134,441.10 is: 201,661.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,426.72 : 734,138.64 = 134,441.10 : x
  2. Step 2: Convert to fraction form
    489,426.72/734,138.64 = 134,441.10/x
  3. Step 3: Cross multiply
    489,426.72x = 734,138.64 × 134,441.10
  4. Step 4: Simplify right side
    489,426.72x = 98,698,406,314.10
  5. Step 5: Solve for x
    x = 98,698,406,314.10/489,426.72
  6. Step 6: Final answer
    x = 201,661.25

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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.