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Finding the Fourth Proportional to 916.23, 1,374.89 and 339.51

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Solution

The fourth proportional to 916.23, 1,374.89 and 339.51 is: 509.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    916.23 : 1,374.89 = 339.51 : x
  2. Step 2: Convert to fraction form
    916.23/1,374.89 = 339.51/x
  3. Step 3: Cross multiply
    916.23x = 1,374.89 × 339.51
  4. Step 4: Simplify right side
    916.23x = 466,788.90
  5. Step 5: Solve for x
    x = 466,788.90/916.23
  6. Step 6: Final answer
    x = 509.47

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Double scale
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1.5x scale

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.