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Finding the Fourth Proportional to 529.07, 728.80 and 503.15

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Solution

The fourth proportional to 529.07, 728.80 and 503.15 is: 693.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.07 : 728.80 = 503.15 : x
  2. Step 2: Convert to fraction form
    529.07/728.80 = 503.15/x
  3. Step 3: Cross multiply
    529.07x = 728.80 × 503.15
  4. Step 4: Simplify right side
    529.07x = 366,690.82
  5. Step 5: Solve for x
    x = 366,690.82/529.07
  6. Step 6: Final answer
    x = 693.09

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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.