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Finding the Fourth Proportional to 505.29, 697.05 and 358

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Solution

The fourth proportional to 505.29, 697.05 and 358 is: 493.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.29 : 697.05 = 358 : x
  2. Step 2: Convert to fraction form
    505.29/697.05 = 358/x
  3. Step 3: Cross multiply
    505.29x = 697.05 × 358
  4. Step 4: Simplify right side
    505.29x = 249,543.90
  5. Step 5: Solve for x
    x = 249,543.90/505.29
  6. Step 6: Final answer
    x = 493.87

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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.