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Finding the Fourth Proportional to 289,029.28, 433,682.16 and 102,128.80

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Solution

The fourth proportional to 289,029.28, 433,682.16 and 102,128.80 is: 153,242.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,029.28 : 433,682.16 = 102,128.80 : x
  2. Step 2: Convert to fraction form
    289,029.28/433,682.16 = 102,128.80/x
  3. Step 3: Cross multiply
    289,029.28x = 433,682.16 × 102,128.80
  4. Step 4: Simplify right side
    289,029.28x = 44,291,438,582.21
  5. Step 5: Solve for x
    x = 44,291,438,582.21/289,029.28
  6. Step 6: Final answer
    x = 153,242.05

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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.