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Finding the Fourth Proportional to 399,860.76, 551,807.80 and 218,573.40

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Solution

The fourth proportional to 399,860.76, 551,807.80 and 218,573.40 is: 301,631.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,860.76 : 551,807.80 = 218,573.40 : x
  2. Step 2: Convert to fraction form
    399,860.76/551,807.80 = 218,573.40/x
  3. Step 3: Cross multiply
    399,860.76x = 551,807.80 × 218,573.40
  4. Step 4: Simplify right side
    399,860.76x = 120,610,506,992.52
  5. Step 5: Solve for x
    x = 120,610,506,992.52/399,860.76
  6. Step 6: Final answer
    x = 301,631.27

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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.