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Finding the Fourth Proportional to 388,090.81, 535,369.35 and 226,840.51

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Solution

The fourth proportional to 388,090.81, 535,369.35 and 226,840.51 is: 312,925.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,090.81 : 535,369.35 = 226,840.51 : x
  2. Step 2: Convert to fraction form
    388,090.81/535,369.35 = 226,840.51/x
  3. Step 3: Cross multiply
    388,090.81x = 535,369.35 × 226,840.51
  4. Step 4: Simplify right side
    388,090.81x = 121,443,456,392.37
  5. Step 5: Solve for x
    x = 121,443,456,392.37/388,090.81
  6. Step 6: Final answer
    x = 312,925.36

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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.