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Finding the Fourth Proportional to 487, 672.16 and 370.36

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Solution

The fourth proportional to 487, 672.16 and 370.36 is: 511.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    487 : 672.16 = 370.36 : x
  2. Step 2: Convert to fraction form
    487/672.16 = 370.36/x
  3. Step 3: Cross multiply
    487x = 672.16 × 370.36
  4. Step 4: Simplify right side
    487x = 248,941.18
  5. Step 5: Solve for x
    x = 248,941.18/487
  6. Step 6: Final answer
    x = 511.17

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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.