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Finding the Fourth Proportional to 380,626.65, 525,145.41 and 219,459.87

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Solution

The fourth proportional to 380,626.65, 525,145.41 and 219,459.87 is: 302,785.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,626.65 : 525,145.41 = 219,459.87 : x
  2. Step 2: Convert to fraction form
    380,626.65/525,145.41 = 219,459.87/x
  3. Step 3: Cross multiply
    380,626.65x = 525,145.41 × 219,459.87
  4. Step 4: Simplify right side
    380,626.65x = 115,248,343,409.70
  5. Step 5: Solve for x
    x = 115,248,343,409.70/380,626.65
  6. Step 6: Final answer
    x = 302,785.80

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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.