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Finding the Fourth Proportional to 291,573.18, 437,381.94 and 99,387.92

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Solution

The fourth proportional to 291,573.18, 437,381.94 and 99,387.92 is: 149,089.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,573.18 : 437,381.94 = 99,387.92 : x
  2. Step 2: Convert to fraction form
    291,573.18/437,381.94 = 99,387.92/x
  3. Step 3: Cross multiply
    291,573.18x = 437,381.94 × 99,387.92
  4. Step 4: Simplify right side
    291,573.18x = 43,470,482,728.32
  5. Step 5: Solve for x
    x = 43,470,482,728.32/291,573.18
  6. Step 6: Final answer
    x = 149,089.44

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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.