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Finding the Fourth Proportional to 380,812.61, 525,521.39 and 211,057.67

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Solution

The fourth proportional to 380,812.61, 525,521.39 and 211,057.67 is: 291,259.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,812.61 : 525,521.39 = 211,057.67 : x
  2. Step 2: Convert to fraction form
    380,812.61/525,521.39 = 211,057.67/x
  3. Step 3: Cross multiply
    380,812.61x = 525,521.39 × 211,057.67
  4. Step 4: Simplify right side
    380,812.61x = 110,915,316,425.67
  5. Step 5: Solve for x
    x = 110,915,316,425.67/380,812.61
  6. Step 6: Final answer
    x = 291,259.57

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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.