Home / 289,623.20-434,434.80-147,905.60

Finding the Fourth Proportional to 289,623.20, 434,434.80 and 147,905.60

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Solution

The fourth proportional to 289,623.20, 434,434.80 and 147,905.60 is: 221,858.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,623.20 : 434,434.80 = 147,905.60 : x
  2. Step 2: Convert to fraction form
    289,623.20/434,434.80 = 147,905.60/x
  3. Step 3: Cross multiply
    289,623.20x = 434,434.80 × 147,905.60
  4. Step 4: Simplify right side
    289,623.20x = 64,255,339,754.88
  5. Step 5: Solve for x
    x = 64,255,339,754.88/289,623.20
  6. Step 6: Final answer
    x = 221,858.40

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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.