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Finding the Fourth Proportional to 400,130.78, 552,160.01 and 218,807.47

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Solution

The fourth proportional to 400,130.78, 552,160.01 and 218,807.47 is: 301,943.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,130.78 : 552,160.01 = 218,807.47 : x
  2. Step 2: Convert to fraction form
    400,130.78/552,160.01 = 218,807.47/x
  3. Step 3: Cross multiply
    400,130.78x = 552,160.01 × 218,807.47
  4. Step 4: Simplify right side
    400,130.78x = 120,816,730,968.44
  5. Step 5: Solve for x
    x = 120,816,730,968.44/400,130.78
  6. Step 6: Final answer
    x = 301,943.11

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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.