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Finding the Fourth Proportional to 612.86, 916.98 and 365.15

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Solution

The fourth proportional to 612.86, 916.98 and 365.15 is: 546.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.86 : 916.98 = 365.15 : x
  2. Step 2: Convert to fraction form
    612.86/916.98 = 365.15/x
  3. Step 3: Cross multiply
    612.86x = 916.98 × 365.15
  4. Step 4: Simplify right side
    612.86x = 334,830.66
  5. Step 5: Solve for x
    x = 334,830.66/612.86
  6. Step 6: Final answer
    x = 546.35

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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.