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Finding the Fourth Proportional to 261,639.77, 392,447.35 and 153,629.31

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Solution

The fourth proportional to 261,639.77, 392,447.35 and 153,629.31 is: 230,436.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,639.77 : 392,447.35 = 153,629.31 : x
  2. Step 2: Convert to fraction form
    261,639.77/392,447.35 = 153,629.31/x
  3. Step 3: Cross multiply
    261,639.77x = 392,447.35 × 153,629.31
  4. Step 4: Simplify right side
    261,639.77x = 60,291,415,480.11
  5. Step 5: Solve for x
    x = 60,291,415,480.11/261,639.77
  6. Step 6: Final answer
    x = 230,436.74

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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.