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Finding the Fourth Proportional to 291,712.40, 437,568.60 and 221,728.40

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Solution

The fourth proportional to 291,712.40, 437,568.60 and 221,728.40 is: 332,592.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,712.40 : 437,568.60 = 221,728.40 : x
  2. Step 2: Convert to fraction form
    291,712.40/437,568.60 = 221,728.40/x
  3. Step 3: Cross multiply
    291,712.40x = 437,568.60 × 221,728.40
  4. Step 4: Simplify right side
    291,712.40x = 97,021,385,568.24
  5. Step 5: Solve for x
    x = 97,021,385,568.24/291,712.40
  6. Step 6: Final answer
    x = 332,592.60

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1.5x scale

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.