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Finding the Fourth Proportional to 618,684.90, 926,830.28 and 347,990.69

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Solution

The fourth proportional to 618,684.90, 926,830.28 and 347,990.69 is: 521,312.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,684.90 : 926,830.28 = 347,990.69 : x
  2. Step 2: Convert to fraction form
    618,684.90/926,830.28 = 347,990.69/x
  3. Step 3: Cross multiply
    618,684.90x = 926,830.28 × 347,990.69
  4. Step 4: Simplify right side
    618,684.90x = 322,528,302,275.99
  5. Step 5: Solve for x
    x = 322,528,302,275.99/618,684.90
  6. Step 6: Final answer
    x = 521,312.71

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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.