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Finding the Fourth Proportional to 289,364.60, 434,089.18 and 139,481.63

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Solution

The fourth proportional to 289,364.60, 434,089.18 and 139,481.63 is: 209,242.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,364.60 : 434,089.18 = 139,481.63 : x
  2. Step 2: Convert to fraction form
    289,364.60/434,089.18 = 139,481.63/x
  3. Step 3: Cross multiply
    289,364.60x = 434,089.18 × 139,481.63
  4. Step 4: Simplify right side
    289,364.60x = 60,547,466,391.76
  5. Step 5: Solve for x
    x = 60,547,466,391.76/289,364.60
  6. Step 6: Final answer
    x = 209,242.83

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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.