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Finding the Fourth Proportional to 282,695.70, 390,103.56 and 155,371.39

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Solution

The fourth proportional to 282,695.70, 390,103.56 and 155,371.39 is: 214,403.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,695.70 : 390,103.56 = 155,371.39 : x
  2. Step 2: Convert to fraction form
    282,695.70/390,103.56 = 155,371.39/x
  3. Step 3: Cross multiply
    282,695.70x = 390,103.56 × 155,371.39
  4. Step 4: Simplify right side
    282,695.70x = 60,610,932,361.15
  5. Step 5: Solve for x
    x = 60,610,932,361.15/282,695.70
  6. Step 6: Final answer
    x = 214,403.45

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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.