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Finding the Fourth Proportional to 253,632.08, 380,419.32 and 66,658.16

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Solution

The fourth proportional to 253,632.08, 380,419.32 and 66,658.16 is: 99,979.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,632.08 : 380,419.32 = 66,658.16 : x
  2. Step 2: Convert to fraction form
    253,632.08/380,419.32 = 66,658.16/x
  3. Step 3: Cross multiply
    253,632.08x = 380,419.32 × 66,658.16
  4. Step 4: Simplify right side
    253,632.08x = 25,358,051,899.65
  5. Step 5: Solve for x
    x = 25,358,051,899.65/253,632.08
  6. Step 6: Final answer
    x = 99,979.67

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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.