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Finding the Fourth Proportional to 612.61, 914.51 and 525

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Solution

The fourth proportional to 612.61, 914.51 and 525 is: 783.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.61 : 914.51 = 525 : x
  2. Step 2: Convert to fraction form
    612.61/914.51 = 525/x
  3. Step 3: Cross multiply
    612.61x = 914.51 × 525
  4. Step 4: Simplify right side
    612.61x = 480,117.75
  5. Step 5: Solve for x
    x = 480,117.75/612.61
  6. Step 6: Final answer
    x = 783.72

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These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.