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Finding the Fourth Proportional to 553,384.20, 830,076.30 and 313,251.60

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Solution

The fourth proportional to 553,384.20, 830,076.30 and 313,251.60 is: 469,877.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,384.20 : 830,076.30 = 313,251.60 : x
  2. Step 2: Convert to fraction form
    553,384.20/830,076.30 = 313,251.60/x
  3. Step 3: Cross multiply
    553,384.20x = 830,076.30 × 313,251.60
  4. Step 4: Simplify right side
    553,384.20x = 260,022,729,097.08
  5. Step 5: Solve for x
    x = 260,022,729,097.08/553,384.20
  6. Step 6: Final answer
    x = 469,877.40

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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.