Home / 635,678.65-876,869.79-380,882.20

Finding the Fourth Proportional to 635,678.65, 876,869.79 and 380,882.20

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Solution

The fourth proportional to 635,678.65, 876,869.79 and 380,882.20 is: 525,397.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    635,678.65 : 876,869.79 = 380,882.20 : x
  2. Step 2: Convert to fraction form
    635,678.65/876,869.79 = 380,882.20/x
  3. Step 3: Cross multiply
    635,678.65x = 876,869.79 × 380,882.20
  4. Step 4: Simplify right side
    635,678.65x = 333,984,094,728.74
  5. Step 5: Solve for x
    x = 333,984,094,728.74/635,678.65
  6. Step 6: Final answer
    x = 525,397.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.