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Finding the Fourth Proportional to 306,468.80, 459,703.20 and 211,990.40

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Solution

The fourth proportional to 306,468.80, 459,703.20 and 211,990.40 is: 317,985.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,468.80 : 459,703.20 = 211,990.40 : x
  2. Step 2: Convert to fraction form
    306,468.80/459,703.20 = 211,990.40/x
  3. Step 3: Cross multiply
    306,468.80x = 459,703.20 × 211,990.40
  4. Step 4: Simplify right side
    306,468.80x = 97,452,665,249.28
  5. Step 5: Solve for x
    x = 97,452,665,249.28/306,468.80
  6. Step 6: Final answer
    x = 317,985.60

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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.