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Finding the Fourth Proportional to 1,688.05, 2,530.99 and 713.89

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Solution

The fourth proportional to 1,688.05, 2,530.99 and 713.89 is: 1,070.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.05 : 2,530.99 = 713.89 : x
  2. Step 2: Convert to fraction form
    1,688.05/2,530.99 = 713.89/x
  3. Step 3: Cross multiply
    1,688.05x = 2,530.99 × 713.89
  4. Step 4: Simplify right side
    1,688.05x = 1,806,848.45
  5. Step 5: Solve for x
    x = 1,806,848.45/1,688.05
  6. Step 6: Final answer
    x = 1,070.38

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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.