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Finding the Fourth Proportional to 285,856.75, 394,479.57 and 156,792.55

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Solution

The fourth proportional to 285,856.75, 394,479.57 and 156,792.55 is: 216,372.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,856.75 : 394,479.57 = 156,792.55 : x
  2. Step 2: Convert to fraction form
    285,856.75/394,479.57 = 156,792.55/x
  3. Step 3: Cross multiply
    285,856.75x = 394,479.57 × 156,792.55
  4. Step 4: Simplify right side
    285,856.75x = 61,851,457,703.20
  5. Step 5: Solve for x
    x = 61,851,457,703.20/285,856.75
  6. Step 6: Final answer
    x = 216,372.21

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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.