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Finding the Fourth Proportional to 623.66, 860.75 and 358.19

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Solution

The fourth proportional to 623.66, 860.75 and 358.19 is: 494.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.66 : 860.75 = 358.19 : x
  2. Step 2: Convert to fraction form
    623.66/860.75 = 358.19/x
  3. Step 3: Cross multiply
    623.66x = 860.75 × 358.19
  4. Step 4: Simplify right side
    623.66x = 308,312.04
  5. Step 5: Solve for x
    x = 308,312.04/623.66
  6. Step 6: Final answer
    x = 494.36

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.