Home / 399,639.64-551,496.27-218,347.68

Finding the Fourth Proportional to 399,639.64, 551,496.27 and 218,347.68

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Solution

The fourth proportional to 399,639.64, 551,496.27 and 218,347.68 is: 301,316.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,639.64 : 551,496.27 = 218,347.68 : x
  2. Step 2: Convert to fraction form
    399,639.64/551,496.27 = 218,347.68/x
  3. Step 3: Cross multiply
    399,639.64x = 551,496.27 × 218,347.68
  4. Step 4: Simplify right side
    399,639.64x = 120,417,931,083.15
  5. Step 5: Solve for x
    x = 120,417,931,083.15/399,639.64
  6. Step 6: Final answer
    x = 301,316.28

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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.