Home / 399,327.04-551,067.08-218,038.40

Finding the Fourth Proportional to 399,327.04, 551,067.08 and 218,038.40

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Solution

The fourth proportional to 399,327.04, 551,067.08 and 218,038.40 is: 300,890.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,327.04 : 551,067.08 = 218,038.40 : x
  2. Step 2: Convert to fraction form
    399,327.04/551,067.08 = 218,038.40/x
  3. Step 3: Cross multiply
    399,327.04x = 551,067.08 × 218,038.40
  4. Step 4: Simplify right side
    399,327.04x = 120,153,784,415.87
  5. Step 5: Solve for x
    x = 120,153,784,415.87/399,327.04
  6. Step 6: Final answer
    x = 300,890.68

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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.