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Finding the Fourth Proportional to 688.05, 1,031.54 and 590.51

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Solution

The fourth proportional to 688.05, 1,031.54 and 590.51 is: 885.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.05 : 1,031.54 = 590.51 : x
  2. Step 2: Convert to fraction form
    688.05/1,031.54 = 590.51/x
  3. Step 3: Cross multiply
    688.05x = 1,031.54 × 590.51
  4. Step 4: Simplify right side
    688.05x = 609,134.31
  5. Step 5: Solve for x
    x = 609,134.31/688.05
  6. Step 6: Final answer
    x = 885.31

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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.