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Finding the Fourth Proportional to 553,713.60, 830,570.40 and 317,080.20

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Solution

The fourth proportional to 553,713.60, 830,570.40 and 317,080.20 is: 475,620.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,713.60 : 830,570.40 = 317,080.20 : x
  2. Step 2: Convert to fraction form
    553,713.60/830,570.40 = 317,080.20/x
  3. Step 3: Cross multiply
    553,713.60x = 830,570.40 × 317,080.20
  4. Step 4: Simplify right side
    553,713.60x = 263,357,428,546.08
  5. Step 5: Solve for x
    x = 263,357,428,546.08/553,713.60
  6. Step 6: Final answer
    x = 475,620.30

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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.