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Finding the Fourth Proportional to 5,384.30, 7,430.90 and 3,146.90

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Solution

The fourth proportional to 5,384.30, 7,430.90 and 3,146.90 is: 4,343.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,384.30 : 7,430.90 = 3,146.90 : x
  2. Step 2: Convert to fraction form
    5,384.30/7,430.90 = 3,146.90/x
  3. Step 3: Cross multiply
    5,384.30x = 7,430.90 × 3,146.90
  4. Step 4: Simplify right side
    5,384.30x = 23,384,246.32
  5. Step 5: Solve for x
    x = 23,384,246.32/5,384.30
  6. Step 6: Final answer
    x = 4,343.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.