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Finding the Fourth Proportional to 553,913.70, 831,128.90 and 216,866.93

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Solution

The fourth proportional to 553,913.70, 831,128.90 and 216,866.93 is: 325,401.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,913.70 : 831,128.90 = 216,866.93 : x
  2. Step 2: Convert to fraction form
    553,913.70/831,128.90 = 216,866.93/x
  3. Step 3: Cross multiply
    553,913.70x = 831,128.90 × 216,866.93
  4. Step 4: Simplify right side
    553,913.70x = 180,244,367,737.30
  5. Step 5: Solve for x
    x = 180,244,367,737.30/553,913.70
  6. Step 6: Final answer
    x = 325,401.53

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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.