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Finding the Fourth Proportional to 817,274.80, 1,225,912.20 and 256,308.40

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Solution

The fourth proportional to 817,274.80, 1,225,912.20 and 256,308.40 is: 384,462.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,274.80 : 1,225,912.20 = 256,308.40 : x
  2. Step 2: Convert to fraction form
    817,274.80/1,225,912.20 = 256,308.40/x
  3. Step 3: Cross multiply
    817,274.80x = 1,225,912.20 × 256,308.40
  4. Step 4: Simplify right side
    817,274.80x = 314,211,594,522.48
  5. Step 5: Solve for x
    x = 314,211,594,522.48/817,274.80
  6. Step 6: Final answer
    x = 384,462.60

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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.