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Finding the Fourth Proportional to 370,489.05, 555,728.72 and 90,005.49

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Solution

The fourth proportional to 370,489.05, 555,728.72 and 90,005.49 is: 135,007.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    370,489.05 : 555,728.72 = 90,005.49 : x
  2. Step 2: Convert to fraction form
    370,489.05/555,728.72 = 90,005.49/x
  3. Step 3: Cross multiply
    370,489.05x = 555,728.72 × 90,005.49
  4. Step 4: Simplify right side
    370,489.05x = 50,018,635,300.65
  5. Step 5: Solve for x
    x = 50,018,635,300.65/370,489.05
  6. Step 6: Final answer
    x = 135,007.05

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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.