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Finding the Fourth Proportional to 503.86, 695.48 and 307.47

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Solution

The fourth proportional to 503.86, 695.48 and 307.47 is: 424.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.86 : 695.48 = 307.47 : x
  2. Step 2: Convert to fraction form
    503.86/695.48 = 307.47/x
  3. Step 3: Cross multiply
    503.86x = 695.48 × 307.47
  4. Step 4: Simplify right side
    503.86x = 213,839.24
  5. Step 5: Solve for x
    x = 213,839.24/503.86
  6. Step 6: Final answer
    x = 424.40

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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.