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Finding the Fourth Proportional to 411,307.40, 617,882.70 and 394,513.80

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Solution

The fourth proportional to 411,307.40, 617,882.70 and 394,513.80 is: 592,654.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,307.40 : 617,882.70 = 394,513.80 : x
  2. Step 2: Convert to fraction form
    411,307.40/617,882.70 = 394,513.80/x
  3. Step 3: Cross multiply
    411,307.40x = 617,882.70 × 394,513.80
  4. Step 4: Simplify right side
    411,307.40x = 243,763,251,931.26
  5. Step 5: Solve for x
    x = 243,763,251,931.26/411,307.40
  6. Step 6: Final answer
    x = 592,654.67

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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.