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Finding the Fourth Proportional to 640,249.63, 960,478.68 and 299,034.28

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Solution

The fourth proportional to 640,249.63, 960,478.68 and 299,034.28 is: 448,600.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,249.63 : 960,478.68 = 299,034.28 : x
  2. Step 2: Convert to fraction form
    640,249.63/960,478.68 = 299,034.28/x
  3. Step 3: Cross multiply
    640,249.63x = 960,478.68 × 299,034.28
  4. Step 4: Simplify right side
    640,249.63x = 287,216,051,169.06
  5. Step 5: Solve for x
    x = 287,216,051,169.06/640,249.63
  6. Step 6: Final answer
    x = 448,600.10

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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.