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Finding the Fourth Proportional to 58.02, 79.99 and 56.20

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Solution

The fourth proportional to 58.02, 79.99 and 56.20 is: 77.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.02 : 79.99 = 56.20 : x
  2. Step 2: Convert to fraction form
    58.02/79.99 = 56.20/x
  3. Step 3: Cross multiply
    58.02x = 79.99 × 56.20
  4. Step 4: Simplify right side
    58.02x = 4,495.10
  5. Step 5: Solve for x
    x = 4,495.10/58.02
  6. Step 6: Final answer
    x = 77.47

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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.