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Finding the Fourth Proportional to 551,144.34, 760,572.72 and 309,420.90

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Solution

The fourth proportional to 551,144.34, 760,572.72 and 309,420.90 is: 426,997.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,144.34 : 760,572.72 = 309,420.90 : x
  2. Step 2: Convert to fraction form
    551,144.34/760,572.72 = 309,420.90/x
  3. Step 3: Cross multiply
    551,144.34x = 760,572.72 × 309,420.90
  4. Step 4: Simplify right side
    551,144.34x = 235,337,095,537.85
  5. Step 5: Solve for x
    x = 235,337,095,537.85/551,144.34
  6. Step 6: Final answer
    x = 426,997.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.