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Finding the Fourth Proportional to 495,118.32, 683,289.72 and 280,306.32

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Solution

The fourth proportional to 495,118.32, 683,289.72 and 280,306.32 is: 386,837.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    495,118.32 : 683,289.72 = 280,306.32 : x
  2. Step 2: Convert to fraction form
    495,118.32/683,289.72 = 280,306.32/x
  3. Step 3: Cross multiply
    495,118.32x = 683,289.72 × 280,306.32
  4. Step 4: Simplify right side
    495,118.32x = 191,530,426,907.03
  5. Step 5: Solve for x
    x = 191,530,426,907.03/495,118.32
  6. Step 6: Final answer
    x = 386,837.69

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1.5x scale

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.