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Finding the Fourth Proportional to 790.55, 1,090.59 and 510.87

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Solution

The fourth proportional to 790.55, 1,090.59 and 510.87 is: 704.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.55 : 1,090.59 = 510.87 : x
  2. Step 2: Convert to fraction form
    790.55/1,090.59 = 510.87/x
  3. Step 3: Cross multiply
    790.55x = 1,090.59 × 510.87
  4. Step 4: Simplify right side
    790.55x = 557,149.71
  5. Step 5: Solve for x
    x = 557,149.71/790.55
  6. Step 6: Final answer
    x = 704.77

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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.