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Finding the Fourth Proportional to 399,699.32, 551,586.51 and 218,411.26

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Solution

The fourth proportional to 399,699.32, 551,586.51 and 218,411.26 is: 301,408.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,699.32 : 551,586.51 = 218,411.26 : x
  2. Step 2: Convert to fraction form
    399,699.32/551,586.51 = 218,411.26/x
  3. Step 3: Cross multiply
    399,699.32x = 551,586.51 × 218,411.26
  4. Step 4: Simplify right side
    399,699.32x = 120,472,704,648.10
  5. Step 5: Solve for x
    x = 120,472,704,648.10/399,699.32
  6. Step 6: Final answer
    x = 301,408.33

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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.