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Finding the Fourth Proportional to 391,473.40, 587,210.10 and 307,492.60

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Solution

The fourth proportional to 391,473.40, 587,210.10 and 307,492.60 is: 461,238.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,473.40 : 587,210.10 = 307,492.60 : x
  2. Step 2: Convert to fraction form
    391,473.40/587,210.10 = 307,492.60/x
  3. Step 3: Cross multiply
    391,473.40x = 587,210.10 × 307,492.60
  4. Step 4: Simplify right side
    391,473.40x = 180,562,760,395.26
  5. Step 5: Solve for x
    x = 180,562,760,395.26/391,473.40
  6. Step 6: Final answer
    x = 461,238.90

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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.