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Finding the Fourth Proportional to 602.31, 831.19 and 340.32

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Solution

The fourth proportional to 602.31, 831.19 and 340.32 is: 469.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    602.31 : 831.19 = 340.32 : x
  2. Step 2: Convert to fraction form
    602.31/831.19 = 340.32/x
  3. Step 3: Cross multiply
    602.31x = 831.19 × 340.32
  4. Step 4: Simplify right side
    602.31x = 282,870.58
  5. Step 5: Solve for x
    x = 282,870.58/602.31
  6. Step 6: Final answer
    x = 469.64

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Double scale
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1.5x scale

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.