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Finding the Fourth Proportional to 282,639.82, 390,041.76 and 161,780.50

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Solution

The fourth proportional to 282,639.82, 390,041.76 and 161,780.50 is: 223,256.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,639.82 : 390,041.76 = 161,780.50 : x
  2. Step 2: Convert to fraction form
    282,639.82/390,041.76 = 161,780.50/x
  3. Step 3: Cross multiply
    282,639.82x = 390,041.76 × 161,780.50
  4. Step 4: Simplify right side
    282,639.82x = 63,101,150,953.68
  5. Step 5: Solve for x
    x = 63,101,150,953.68/282,639.82
  6. Step 6: Final answer
    x = 223,256.41

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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.