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Finding the Fourth Proportional to 550,346.40, 825,519.60 and 390,914.10

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Solution

The fourth proportional to 550,346.40, 825,519.60 and 390,914.10 is: 586,371.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    550,346.40 : 825,519.60 = 390,914.10 : x
  2. Step 2: Convert to fraction form
    550,346.40/825,519.60 = 390,914.10/x
  3. Step 3: Cross multiply
    550,346.40x = 825,519.60 × 390,914.10
  4. Step 4: Simplify right side
    550,346.40x = 322,707,251,466.36
  5. Step 5: Solve for x
    x = 322,707,251,466.36/550,346.40
  6. Step 6: Final answer
    x = 586,371.15

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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.