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Finding the Fourth Proportional to 291,990.60, 437,985.90 and 192,263.40

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Solution

The fourth proportional to 291,990.60, 437,985.90 and 192,263.40 is: 288,395.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,990.60 : 437,985.90 = 192,263.40 : x
  2. Step 2: Convert to fraction form
    291,990.60/437,985.90 = 192,263.40/x
  3. Step 3: Cross multiply
    291,990.60x = 437,985.90 × 192,263.40
  4. Step 4: Simplify right side
    291,990.60x = 84,208,658,286.06
  5. Step 5: Solve for x
    x = 84,208,658,286.06/291,990.60
  6. Step 6: Final answer
    x = 288,395.10

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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.