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Finding the Fourth Proportional to 559,780.61, 772,468.09 and 318,029.63

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Solution

The fourth proportional to 559,780.61, 772,468.09 and 318,029.63 is: 438,864.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,780.61 : 772,468.09 = 318,029.63 : x
  2. Step 2: Convert to fraction form
    559,780.61/772,468.09 = 318,029.63/x
  3. Step 3: Cross multiply
    559,780.61x = 772,468.09 × 318,029.63
  4. Step 4: Simplify right side
    559,780.61x = 245,667,737,981.01
  5. Step 5: Solve for x
    x = 245,667,737,981.01/559,780.61
  6. Step 6: Final answer
    x = 438,864.33

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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.