Home / 645,519.40-968,279.10-329,871.40

Finding the Fourth Proportional to 645,519.40, 968,279.10 and 329,871.40

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Solution

The fourth proportional to 645,519.40, 968,279.10 and 329,871.40 is: 494,807.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,519.40 : 968,279.10 = 329,871.40 : x
  2. Step 2: Convert to fraction form
    645,519.40/968,279.10 = 329,871.40/x
  3. Step 3: Cross multiply
    645,519.40x = 968,279.10 × 329,871.40
  4. Step 4: Simplify right side
    645,519.40x = 319,407,582,307.74
  5. Step 5: Solve for x
    x = 319,407,582,307.74/645,519.40
  6. Step 6: Final answer
    x = 494,807.10

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Double scale
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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.