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Finding the Fourth Proportional to 291,920.40, 437,880.60 and 242,056.80

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Solution

The fourth proportional to 291,920.40, 437,880.60 and 242,056.80 is: 363,085.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,920.40 : 437,880.60 = 242,056.80 : x
  2. Step 2: Convert to fraction form
    291,920.40/437,880.60 = 242,056.80/x
  3. Step 3: Cross multiply
    291,920.40x = 437,880.60 × 242,056.80
  4. Step 4: Simplify right side
    291,920.40x = 105,991,976,818.08
  5. Step 5: Solve for x
    x = 105,991,976,818.08/291,920.40
  6. Step 6: Final answer
    x = 363,085.20

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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.