Home / 4,258.40-6,389.12-1,663.20

Finding the Fourth Proportional to 4,258.40, 6,389.12 and 1,663.20

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Solution

The fourth proportional to 4,258.40, 6,389.12 and 1,663.20 is: 2,495.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,258.40 : 6,389.12 = 1,663.20 : x
  2. Step 2: Convert to fraction form
    4,258.40/6,389.12 = 1,663.20/x
  3. Step 3: Cross multiply
    4,258.40x = 6,389.12 × 1,663.20
  4. Step 4: Simplify right side
    4,258.40x = 10,626,384.38
  5. Step 5: Solve for x
    x = 10,626,384.38/4,258.40
  6. Step 6: Final answer
    x = 2,495.39

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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.