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Finding the Fourth Proportional to 306,124.80, 459,405.90 and 128,759.10

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Solution

The fourth proportional to 306,124.80, 459,405.90 and 128,759.10 is: 193,230.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,124.80 : 459,405.90 = 128,759.10 : x
  2. Step 2: Convert to fraction form
    306,124.80/459,405.90 = 128,759.10/x
  3. Step 3: Cross multiply
    306,124.80x = 459,405.90 × 128,759.10
  4. Step 4: Simplify right side
    306,124.80x = 59,152,690,218.69
  5. Step 5: Solve for x
    x = 59,152,690,218.69/306,124.80
  6. Step 6: Final answer
    x = 193,230.64

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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.