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Finding the Fourth Proportional to 291,258.08, 436,960.02 and 91,570.40

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Solution

The fourth proportional to 291,258.08, 436,960.02 and 91,570.40 is: 137,378.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,258.08 : 436,960.02 = 91,570.40 : x
  2. Step 2: Convert to fraction form
    291,258.08/436,960.02 = 91,570.40/x
  3. Step 3: Cross multiply
    291,258.08x = 436,960.02 × 91,570.40
  4. Step 4: Simplify right side
    291,258.08x = 40,012,603,815.41
  5. Step 5: Solve for x
    x = 40,012,603,815.41/291,258.08
  6. Step 6: Final answer
    x = 137,378.52

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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.