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Finding the Fourth Proportional to 289,430.10, 434,145.15 and 254,438.10

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Solution

The fourth proportional to 289,430.10, 434,145.15 and 254,438.10 is: 381,657.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,430.10 : 434,145.15 = 254,438.10 : x
  2. Step 2: Convert to fraction form
    289,430.10/434,145.15 = 254,438.10/x
  3. Step 3: Cross multiply
    289,430.10x = 434,145.15 × 254,438.10
  4. Step 4: Simplify right side
    289,430.10x = 110,463,067,090.22
  5. Step 5: Solve for x
    x = 110,463,067,090.22/289,430.10
  6. Step 6: Final answer
    x = 381,657.15

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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.