Home / 399,716.10-551,584.80-218,429.45

Finding the Fourth Proportional to 399,716.10, 551,584.80 and 218,429.45

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Solution

The fourth proportional to 399,716.10, 551,584.80 and 218,429.45 is: 301,419.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,716.10 : 551,584.80 = 218,429.45 : x
  2. Step 2: Convert to fraction form
    399,716.10/551,584.80 = 218,429.45/x
  3. Step 3: Cross multiply
    399,716.10x = 551,584.80 × 218,429.45
  4. Step 4: Simplify right side
    399,716.10x = 120,482,364,492.36
  5. Step 5: Solve for x
    x = 120,482,364,492.36/399,716.10
  6. Step 6: Final answer
    x = 301,419.84

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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.