Home / 640,825.10-961,237.65-309,049.10

Finding the Fourth Proportional to 640,825.10, 961,237.65 and 309,049.10

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Solution

The fourth proportional to 640,825.10, 961,237.65 and 309,049.10 is: 463,573.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,825.10 : 961,237.65 = 309,049.10 : x
  2. Step 2: Convert to fraction form
    640,825.10/961,237.65 = 309,049.10/x
  3. Step 3: Cross multiply
    640,825.10x = 961,237.65 × 309,049.10
  4. Step 4: Simplify right side
    640,825.10x = 297,069,630,618.62
  5. Step 5: Solve for x
    x = 297,069,630,618.62/640,825.10
  6. Step 6: Final answer
    x = 463,573.65

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Double scale
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Similar ratio
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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.