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Finding the Fourth Proportional to 480,047.70, 720,071.55 and 391,401.30

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Solution

The fourth proportional to 480,047.70, 720,071.55 and 391,401.30 is: 587,101.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,047.70 : 720,071.55 = 391,401.30 : x
  2. Step 2: Convert to fraction form
    480,047.70/720,071.55 = 391,401.30/x
  3. Step 3: Cross multiply
    480,047.70x = 720,071.55 × 391,401.30
  4. Step 4: Simplify right side
    480,047.70x = 281,836,940,763.02
  5. Step 5: Solve for x
    x = 281,836,940,763.02/480,047.70
  6. Step 6: Final answer
    x = 587,101.95

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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.