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Finding the Fourth Proportional to 306,145.80, 459,218.70 and 272,320.20

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Solution

The fourth proportional to 306,145.80, 459,218.70 and 272,320.20 is: 408,480.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,145.80 : 459,218.70 = 272,320.20 : x
  2. Step 2: Convert to fraction form
    306,145.80/459,218.70 = 272,320.20/x
  3. Step 3: Cross multiply
    306,145.80x = 459,218.70 × 272,320.20
  4. Step 4: Simplify right side
    306,145.80x = 125,054,528,227.74
  5. Step 5: Solve for x
    x = 125,054,528,227.74/306,145.80
  6. Step 6: Final answer
    x = 408,480.30

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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.