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Finding the Fourth Proportional to 1,807.31, 2,712.18 and 653.06

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Solution

The fourth proportional to 1,807.31, 2,712.18 and 653.06 is: 980.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,807.31 : 2,712.18 = 653.06 : x
  2. Step 2: Convert to fraction form
    1,807.31/2,712.18 = 653.06/x
  3. Step 3: Cross multiply
    1,807.31x = 2,712.18 × 653.06
  4. Step 4: Simplify right side
    1,807.31x = 1,771,225.50
  5. Step 5: Solve for x
    x = 1,771,225.50/1,807.31
  6. Step 6: Final answer
    x = 980.03

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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.