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Finding the Fourth Proportional to 291,712.40, 437,568.60 and 260,219.60

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Solution

The fourth proportional to 291,712.40, 437,568.60 and 260,219.60 is: 390,329.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,712.40 : 437,568.60 = 260,219.60 : x
  2. Step 2: Convert to fraction form
    291,712.40/437,568.60 = 260,219.60/x
  3. Step 3: Cross multiply
    291,712.40x = 437,568.60 × 260,219.60
  4. Step 4: Simplify right side
    291,712.40x = 113,863,926,064.56
  5. Step 5: Solve for x
    x = 113,863,926,064.56/291,712.40
  6. Step 6: Final answer
    x = 390,329.40

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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.