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Finding the Fourth Proportional to 291,368.72, 436,780.92 and 141,499.28

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Solution

The fourth proportional to 291,368.72, 436,780.92 and 141,499.28 is: 212,116.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,368.72 : 436,780.92 = 141,499.28 : x
  2. Step 2: Convert to fraction form
    291,368.72/436,780.92 = 141,499.28/x
  3. Step 3: Cross multiply
    291,368.72x = 436,780.92 × 141,499.28
  4. Step 4: Simplify right side
    291,368.72x = 61,804,185,697.74
  5. Step 5: Solve for x
    x = 61,804,185,697.74/291,368.72
  6. Step 6: Final answer
    x = 212,116.75

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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.