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Finding the Fourth Proportional to 286,836.80, 430,255.20 and 162,420.80

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Solution

The fourth proportional to 286,836.80, 430,255.20 and 162,420.80 is: 243,631.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,836.80 : 430,255.20 = 162,420.80 : x
  2. Step 2: Convert to fraction form
    286,836.80/430,255.20 = 162,420.80/x
  3. Step 3: Cross multiply
    286,836.80x = 430,255.20 × 162,420.80
  4. Step 4: Simplify right side
    286,836.80x = 69,882,393,788.16
  5. Step 5: Solve for x
    x = 69,882,393,788.16/286,836.80
  6. Step 6: Final answer
    x = 243,631.20

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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.