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Finding the Fourth Proportional to 553,913.72, 831,010.68 and 154,554.32

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Solution

The fourth proportional to 553,913.72, 831,010.68 and 154,554.32 is: 231,870.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,913.72 : 831,010.68 = 154,554.32 : x
  2. Step 2: Convert to fraction form
    553,913.72/831,010.68 = 154,554.32/x
  3. Step 3: Cross multiply
    553,913.72x = 831,010.68 × 154,554.32
  4. Step 4: Simplify right side
    553,913.72x = 128,436,290,560.14
  5. Step 5: Solve for x
    x = 128,436,290,560.14/553,913.72
  6. Step 6: Final answer
    x = 231,870.57

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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.