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Finding the Fourth Proportional to 692,439.72, 1,038,776.22 and 318,453

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Solution

The fourth proportional to 692,439.72, 1,038,776.22 and 318,453 is: 477,733.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,439.72 : 1,038,776.22 = 318,453 : x
  2. Step 2: Convert to fraction form
    692,439.72/1,038,776.22 = 318,453/x
  3. Step 3: Cross multiply
    692,439.72x = 1,038,776.22 × 318,453
  4. Step 4: Simplify right side
    692,439.72x = 330,801,403,587.66
  5. Step 5: Solve for x
    x = 330,801,403,587.66/692,439.72
  6. Step 6: Final answer
    x = 477,733.14

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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.