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Finding the Fourth Proportional to 280,018.47, 386,411.49 and 159,143.79

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Solution

The fourth proportional to 280,018.47, 386,411.49 and 159,143.79 is: 219,610.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,018.47 : 386,411.49 = 159,143.79 : x
  2. Step 2: Convert to fraction form
    280,018.47/386,411.49 = 159,143.79/x
  3. Step 3: Cross multiply
    280,018.47x = 386,411.49 × 159,143.79
  4. Step 4: Simplify right side
    280,018.47x = 61,494,989,018.15
  5. Step 5: Solve for x
    x = 61,494,989,018.15/280,018.47
  6. Step 6: Final answer
    x = 219,610.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.