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Finding the Fourth Proportional to 289,546.40, 434,319.60 and 139,901.60

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Solution

The fourth proportional to 289,546.40, 434,319.60 and 139,901.60 is: 209,852.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,546.40 : 434,319.60 = 139,901.60 : x
  2. Step 2: Convert to fraction form
    289,546.40/434,319.60 = 139,901.60/x
  3. Step 3: Cross multiply
    289,546.40x = 434,319.60 × 139,901.60
  4. Step 4: Simplify right side
    289,546.40x = 60,762,006,951.36
  5. Step 5: Solve for x
    x = 60,762,006,951.36/289,546.40
  6. Step 6: Final answer
    x = 209,852.40

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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.