Home / 640,837.60-961,256.40-309,061.60

Finding the Fourth Proportional to 640,837.60, 961,256.40 and 309,061.60

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Solution

The fourth proportional to 640,837.60, 961,256.40 and 309,061.60 is: 463,592.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,837.60 : 961,256.40 = 309,061.60 : x
  2. Step 2: Convert to fraction form
    640,837.60/961,256.40 = 309,061.60/x
  3. Step 3: Cross multiply
    640,837.60x = 961,256.40 × 309,061.60
  4. Step 4: Simplify right side
    640,837.60x = 297,087,440,994.24
  5. Step 5: Solve for x
    x = 297,087,440,994.24/640,837.60
  6. Step 6: Final answer
    x = 463,592.40

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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.