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Finding the Fourth Proportional to 761.02, 1,050.24 and 499.30

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Solution

The fourth proportional to 761.02, 1,050.24 and 499.30 is: 689.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.02 : 1,050.24 = 499.30 : x
  2. Step 2: Convert to fraction form
    761.02/1,050.24 = 499.30/x
  3. Step 3: Cross multiply
    761.02x = 1,050.24 × 499.30
  4. Step 4: Simplify right side
    761.02x = 524,384.83
  5. Step 5: Solve for x
    x = 524,384.83/761.02
  6. Step 6: Final answer
    x = 689.06

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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.