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Finding the Fourth Proportional to 929.69, 1,282.98 and 536.79

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Solution

The fourth proportional to 929.69, 1,282.98 and 536.79 is: 740.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    929.69 : 1,282.98 = 536.79 : x
  2. Step 2: Convert to fraction form
    929.69/1,282.98 = 536.79/x
  3. Step 3: Cross multiply
    929.69x = 1,282.98 × 536.79
  4. Step 4: Simplify right side
    929.69x = 688,690.83
  5. Step 5: Solve for x
    x = 688,690.83/929.69
  6. Step 6: Final answer
    x = 740.77

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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.