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Finding the Fourth Proportional to 515.64, 712.62 and 507

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Solution

The fourth proportional to 515.64, 712.62 and 507 is: 700.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.64 : 712.62 = 507 : x
  2. Step 2: Convert to fraction form
    515.64/712.62 = 507/x
  3. Step 3: Cross multiply
    515.64x = 712.62 × 507
  4. Step 4: Simplify right side
    515.64x = 361,298.34
  5. Step 5: Solve for x
    x = 361,298.34/515.64
  6. Step 6: Final answer
    x = 700.68

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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.