Home / 643,820.10-965,730.15-312,044.10

Finding the Fourth Proportional to 643,820.10, 965,730.15 and 312,044.10

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Solution

The fourth proportional to 643,820.10, 965,730.15 and 312,044.10 is: 468,066.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,820.10 : 965,730.15 = 312,044.10 : x
  2. Step 2: Convert to fraction form
    643,820.10/965,730.15 = 312,044.10/x
  3. Step 3: Cross multiply
    643,820.10x = 965,730.15 × 312,044.10
  4. Step 4: Simplify right side
    643,820.10x = 301,350,395,499.62
  5. Step 5: Solve for x
    x = 301,350,395,499.62/643,820.10
  6. Step 6: Final answer
    x = 468,066.15

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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.