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Finding the Fourth Proportional to 274,728.80, 411,574.80 and 256,066.40

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Solution

The fourth proportional to 274,728.80, 411,574.80 and 256,066.40 is: 383,616.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,728.80 : 411,574.80 = 256,066.40 : x
  2. Step 2: Convert to fraction form
    274,728.80/411,574.80 = 256,066.40/x
  3. Step 3: Cross multiply
    274,728.80x = 411,574.80 × 256,066.40
  4. Step 4: Simplify right side
    274,728.80x = 105,390,477,366.72
  5. Step 5: Solve for x
    x = 105,390,477,366.72/274,728.80
  6. Step 6: Final answer
    x = 383,616.42

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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.