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Finding the Fourth Proportional to 336,985.20, 505,477.80 and 311,324.40

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Solution

The fourth proportional to 336,985.20, 505,477.80 and 311,324.40 is: 466,986.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    336,985.20 : 505,477.80 = 311,324.40 : x
  2. Step 2: Convert to fraction form
    336,985.20/505,477.80 = 311,324.40/x
  3. Step 3: Cross multiply
    336,985.20x = 505,477.80 × 311,324.40
  4. Step 4: Simplify right side
    336,985.20x = 157,367,572,798.32
  5. Step 5: Solve for x
    x = 157,367,572,798.32/336,985.20
  6. Step 6: Final answer
    x = 466,986.60

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Similar ratio
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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.