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Finding the Fourth Proportional to 381,812.60, 572,718.90 and 346,820.60

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Solution

The fourth proportional to 381,812.60, 572,718.90 and 346,820.60 is: 520,230.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,812.60 : 572,718.90 = 346,820.60 : x
  2. Step 2: Convert to fraction form
    381,812.60/572,718.90 = 346,820.60/x
  3. Step 3: Cross multiply
    381,812.60x = 572,718.90 × 346,820.60
  4. Step 4: Simplify right side
    381,812.60x = 198,630,712,529.34
  5. Step 5: Solve for x
    x = 198,630,712,529.34/381,812.60
  6. Step 6: Final answer
    x = 520,230.90

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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.