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Finding the Fourth Proportional to 340.83, 469.81 and 312.58

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Solution

The fourth proportional to 340.83, 469.81 and 312.58 is: 430.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.83 : 469.81 = 312.58 : x
  2. Step 2: Convert to fraction form
    340.83/469.81 = 312.58/x
  3. Step 3: Cross multiply
    340.83x = 469.81 × 312.58
  4. Step 4: Simplify right side
    340.83x = 146,854.19
  5. Step 5: Solve for x
    x = 146,854.19/340.83
  6. Step 6: Final answer
    x = 430.87

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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.