Home / 289,951.60-434,976-90,225.04

Finding the Fourth Proportional to 289,951.60, 434,976 and 90,225.04

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Solution

The fourth proportional to 289,951.60, 434,976 and 90,225.04 is: 135,352.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,951.60 : 434,976 = 90,225.04 : x
  2. Step 2: Convert to fraction form
    289,951.60/434,976 = 90,225.04/x
  3. Step 3: Cross multiply
    289,951.60x = 434,976 × 90,225.04
  4. Step 4: Simplify right side
    289,951.60x = 39,245,726,999.04
  5. Step 5: Solve for x
    x = 39,245,726,999.04/289,951.60
  6. Step 6: Final answer
    x = 135,352.68

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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.