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Finding the Fourth Proportional to 374,652.20, 561,978.30 and 260,490.80

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Solution

The fourth proportional to 374,652.20, 561,978.30 and 260,490.80 is: 390,736.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    374,652.20 : 561,978.30 = 260,490.80 : x
  2. Step 2: Convert to fraction form
    374,652.20/561,978.30 = 260,490.80/x
  3. Step 3: Cross multiply
    374,652.20x = 561,978.30 × 260,490.80
  4. Step 4: Simplify right side
    374,652.20x = 146,390,176,949.64
  5. Step 5: Solve for x
    x = 146,390,176,949.64/374,652.20
  6. Step 6: Final answer
    x = 390,736.20

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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.