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Finding the Fourth Proportional to 285,653.20, 429,516.60 and 279,432.40

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Solution

The fourth proportional to 285,653.20, 429,516.60 and 279,432.40 is: 420,162.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,653.20 : 429,516.60 = 279,432.40 : x
  2. Step 2: Convert to fraction form
    285,653.20/429,516.60 = 279,432.40/x
  3. Step 3: Cross multiply
    285,653.20x = 429,516.60 × 279,432.40
  4. Step 4: Simplify right side
    285,653.20x = 120,020,854,377.84
  5. Step 5: Solve for x
    x = 120,020,854,377.84/285,653.20
  6. Step 6: Final answer
    x = 420,162.82

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1.5x scale

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.