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Finding the Fourth Proportional to 287,309.20, 430,307.70 and 169,211.20

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Solution

The fourth proportional to 287,309.20, 430,307.70 and 169,211.20 is: 253,430.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,309.20 : 430,307.70 = 169,211.20 : x
  2. Step 2: Convert to fraction form
    287,309.20/430,307.70 = 169,211.20/x
  3. Step 3: Cross multiply
    287,309.20x = 430,307.70 × 169,211.20
  4. Step 4: Simplify right side
    287,309.20x = 72,812,882,286.24
  5. Step 5: Solve for x
    x = 72,812,882,286.24/287,309.20
  6. Step 6: Final answer
    x = 253,430.39

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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.