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Finding the Fourth Proportional to 553,912.70, 831,127.40 and 216,865.93

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Solution

The fourth proportional to 553,912.70, 831,127.40 and 216,865.93 is: 325,400.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,912.70 : 831,127.40 = 216,865.93 : x
  2. Step 2: Convert to fraction form
    553,912.70/831,127.40 = 216,865.93/x
  3. Step 3: Cross multiply
    553,912.70x = 831,127.40 × 216,865.93
  4. Step 4: Simplify right side
    553,912.70x = 180,243,215,465.15
  5. Step 5: Solve for x
    x = 180,243,215,465.15/553,912.70
  6. Step 6: Final answer
    x = 325,400.04

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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.