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Finding the Fourth Proportional to 262,639.83, 393,328.45 and 149,978.95

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Solution

The fourth proportional to 262,639.83, 393,328.45 and 149,978.95 is: 224,607.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,639.83 : 393,328.45 = 149,978.95 : x
  2. Step 2: Convert to fraction form
    262,639.83/393,328.45 = 149,978.95/x
  3. Step 3: Cross multiply
    262,639.83x = 393,328.45 × 149,978.95
  4. Step 4: Simplify right side
    262,639.83x = 58,990,988,509.12
  5. Step 5: Solve for x
    x = 58,990,988,509.12/262,639.83
  6. Step 6: Final answer
    x = 224,607.93

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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.