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Finding the Fourth Proportional to 388,649.42, 582,994.98 and 122,430.77

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Solution

The fourth proportional to 388,649.42, 582,994.98 and 122,430.77 is: 183,652.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,649.42 : 582,994.98 = 122,430.77 : x
  2. Step 2: Convert to fraction form
    388,649.42/582,994.98 = 122,430.77/x
  3. Step 3: Cross multiply
    388,649.42x = 582,994.98 × 122,430.77
  4. Step 4: Simplify right side
    388,649.42x = 71,376,521,392.56
  5. Step 5: Solve for x
    x = 71,376,521,392.56/388,649.42
  6. Step 6: Final answer
    x = 183,652.72

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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.