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Finding the Fourth Proportional to 1,284.07, 1,925.71 and 503.89

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Solution

The fourth proportional to 1,284.07, 1,925.71 and 503.89 is: 755.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,284.07 : 1,925.71 = 503.89 : x
  2. Step 2: Convert to fraction form
    1,284.07/1,925.71 = 503.89/x
  3. Step 3: Cross multiply
    1,284.07x = 1,925.71 × 503.89
  4. Step 4: Simplify right side
    1,284.07x = 970,339.94
  5. Step 5: Solve for x
    x = 970,339.94/1,284.07
  6. Step 6: Final answer
    x = 755.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.