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Finding the Fourth Proportional to 287,308.20, 430,306.20 and 169,210.20

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Solution

The fourth proportional to 287,308.20, 430,306.20 and 169,210.20 is: 253,428.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,308.20 : 430,306.20 = 169,210.20 : x
  2. Step 2: Convert to fraction form
    287,308.20/430,306.20 = 169,210.20/x
  3. Step 3: Cross multiply
    287,308.20x = 430,306.20 × 169,210.20
  4. Step 4: Simplify right side
    287,308.20x = 72,812,198,163.24
  5. Step 5: Solve for x
    x = 72,812,198,163.24/287,308.20
  6. Step 6: Final answer
    x = 253,428.89

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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.