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Finding the Fourth Proportional to 386,085.84, 579,144.96 and 105,602.64

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Solution

The fourth proportional to 386,085.84, 579,144.96 and 105,602.64 is: 158,408.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,085.84 : 579,144.96 = 105,602.64 : x
  2. Step 2: Convert to fraction form
    386,085.84/579,144.96 = 105,602.64/x
  3. Step 3: Cross multiply
    386,085.84x = 579,144.96 × 105,602.64
  4. Step 4: Simplify right side
    386,085.84x = 61,159,236,718.69
  5. Step 5: Solve for x
    x = 61,159,236,718.69/386,085.84
  6. Step 6: Final answer
    x = 158,408.39

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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.