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Finding the Fourth Proportional to 612.21, 913.84 and 526.10

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Solution

The fourth proportional to 612.21, 913.84 and 526.10 is: 785.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.21 : 913.84 = 526.10 : x
  2. Step 2: Convert to fraction form
    612.21/913.84 = 526.10/x
  3. Step 3: Cross multiply
    612.21x = 913.84 × 526.10
  4. Step 4: Simplify right side
    612.21x = 480,771.22
  5. Step 5: Solve for x
    x = 480,771.22/612.21
  6. Step 6: Final answer
    x = 785.30

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Why These Related Problems?

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