Home / 399,330.04-551,071.22-218,041.40

Finding the Fourth Proportional to 399,330.04, 551,071.22 and 218,041.40

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Solution

The fourth proportional to 399,330.04, 551,071.22 and 218,041.40 is: 300,894.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,330.04 : 551,071.22 = 218,041.40 : x
  2. Step 2: Convert to fraction form
    399,330.04/551,071.22 = 218,041.40/x
  3. Step 3: Cross multiply
    399,330.04x = 551,071.22 × 218,041.40
  4. Step 4: Simplify right side
    399,330.04x = 120,156,340,308.51
  5. Step 5: Solve for x
    x = 120,156,340,308.51/399,330.04
  6. Step 6: Final answer
    x = 300,894.82

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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.