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Finding the Fourth Proportional to 368,465.80, 553,281.90 and 279,819.40

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Solution

The fourth proportional to 368,465.80, 553,281.90 and 279,819.40 is: 420,171.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,465.80 : 553,281.90 = 279,819.40 : x
  2. Step 2: Convert to fraction form
    368,465.80/553,281.90 = 279,819.40/x
  3. Step 3: Cross multiply
    368,465.80x = 553,281.90 × 279,819.40
  4. Step 4: Simplify right side
    368,465.80x = 154,819,009,288.86
  5. Step 5: Solve for x
    x = 154,819,009,288.86/368,465.80
  6. Step 6: Final answer
    x = 420,171.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.