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Finding the Fourth Proportional to 283,355.63, 391,030.77 and 156,030.92

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Solution

The fourth proportional to 283,355.63, 391,030.77 and 156,030.92 is: 215,322.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,355.63 : 391,030.77 = 156,030.92 : x
  2. Step 2: Convert to fraction form
    283,355.63/391,030.77 = 156,030.92/x
  3. Step 3: Cross multiply
    283,355.63x = 391,030.77 × 156,030.92
  4. Step 4: Simplify right side
    283,355.63x = 61,012,888,836.25
  5. Step 5: Solve for x
    x = 61,012,888,836.25/283,355.63
  6. Step 6: Final answer
    x = 215,322.67

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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.