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Finding the Fourth Proportional to 291,690.40, 437,535.60 and 165,719.20

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Solution

The fourth proportional to 291,690.40, 437,535.60 and 165,719.20 is: 248,578.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,690.40 : 437,535.60 = 165,719.20 : x
  2. Step 2: Convert to fraction form
    291,690.40/437,535.60 = 165,719.20/x
  3. Step 3: Cross multiply
    291,690.40x = 437,535.60 × 165,719.20
  4. Step 4: Simplify right side
    291,690.40x = 72,508,049,603.52
  5. Step 5: Solve for x
    x = 72,508,049,603.52/291,690.40
  6. Step 6: Final answer
    x = 248,578.80

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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.