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Finding the Fourth Proportional to 758.02, 1,045.80 and 496.20

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Solution

The fourth proportional to 758.02, 1,045.80 and 496.20 is: 684.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    758.02 : 1,045.80 = 496.20 : x
  2. Step 2: Convert to fraction form
    758.02/1,045.80 = 496.20/x
  3. Step 3: Cross multiply
    758.02x = 1,045.80 × 496.20
  4. Step 4: Simplify right side
    758.02x = 518,925.96
  5. Step 5: Solve for x
    x = 518,925.96/758.02
  6. Step 6: Final answer
    x = 684.58

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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.