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Finding the Fourth Proportional to 280,603.10, 420,904.65 and 280,603.10

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Solution

The fourth proportional to 280,603.10, 420,904.65 and 280,603.10 is: 420,904.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,603.10 : 420,904.65 = 280,603.10 : x
  2. Step 2: Convert to fraction form
    280,603.10/420,904.65 = 280,603.10/x
  3. Step 3: Cross multiply
    280,603.10x = 420,904.65 × 280,603.10
  4. Step 4: Simplify right side
    280,603.10x = 118,107,149,594.42
  5. Step 5: Solve for x
    x = 118,107,149,594.42/280,603.10
  6. Step 6: Final answer
    x = 420,904.65

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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.