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Finding the Fourth Proportional to 544,639.40, 816,959.10 and 278,311.40

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Solution

The fourth proportional to 544,639.40, 816,959.10 and 278,311.40 is: 417,467.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    544,639.40 : 816,959.10 = 278,311.40 : x
  2. Step 2: Convert to fraction form
    544,639.40/816,959.10 = 278,311.40/x
  3. Step 3: Cross multiply
    544,639.40x = 816,959.10 × 278,311.40
  4. Step 4: Simplify right side
    544,639.40x = 227,369,030,863.74
  5. Step 5: Solve for x
    x = 227,369,030,863.74/544,639.40
  6. Step 6: Final answer
    x = 417,467.10

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Double scale
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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.