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Finding the Fourth Proportional to 356,428.63, 534,638.32 and 86,558.98

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Solution

The fourth proportional to 356,428.63, 534,638.32 and 86,558.98 is: 129,837.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,428.63 : 534,638.32 = 86,558.98 : x
  2. Step 2: Convert to fraction form
    356,428.63/534,638.32 = 86,558.98/x
  3. Step 3: Cross multiply
    356,428.63x = 534,638.32 × 86,558.98
  4. Step 4: Simplify right side
    356,428.63x = 46,277,747,648.11
  5. Step 5: Solve for x
    x = 46,277,747,648.11/356,428.63
  6. Step 6: Final answer
    x = 129,837.35

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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.