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Finding the Fourth Proportional to 509,188.80, 762,746.40 and 260,011.20

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Solution

The fourth proportional to 509,188.80, 762,746.40 and 260,011.20 is: 389,487.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,188.80 : 762,746.40 = 260,011.20 : x
  2. Step 2: Convert to fraction form
    509,188.80/762,746.40 = 260,011.20/x
  3. Step 3: Cross multiply
    509,188.80x = 762,746.40 × 260,011.20
  4. Step 4: Simplify right side
    509,188.80x = 198,322,606,759.68
  5. Step 5: Solve for x
    x = 198,322,606,759.68/509,188.80
  6. Step 6: Final answer
    x = 389,487.37

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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.