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Finding the Fourth Proportional to 602.90, 904.35 and 521.90

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Solution

The fourth proportional to 602.90, 904.35 and 521.90 is: 782.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    602.90 : 904.35 = 521.90 : x
  2. Step 2: Convert to fraction form
    602.90/904.35 = 521.90/x
  3. Step 3: Cross multiply
    602.90x = 904.35 × 521.90
  4. Step 4: Simplify right side
    602.90x = 471,980.27
  5. Step 5: Solve for x
    x = 471,980.27/602.90
  6. Step 6: Final answer
    x = 782.85

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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.