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Finding the Fourth Proportional to 282,711.81, 390,145.35 and 153,650.28

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Solution

The fourth proportional to 282,711.81, 390,145.35 and 153,650.28 is: 212,039.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,711.81 : 390,145.35 = 153,650.28 : x
  2. Step 2: Convert to fraction form
    282,711.81/390,145.35 = 153,650.28/x
  3. Step 3: Cross multiply
    282,711.81x = 390,145.35 × 153,650.28
  4. Step 4: Simplify right side
    282,711.81x = 59,945,942,268.20
  5. Step 5: Solve for x
    x = 59,945,942,268.20/282,711.81
  6. Step 6: Final answer
    x = 212,039.05

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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.