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Finding the Fourth Proportional to 400,729.68, 553,090.46 and 368,413.11

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Solution

The fourth proportional to 400,729.68, 553,090.46 and 368,413.11 is: 508,486.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,729.68 : 553,090.46 = 368,413.11 : x
  2. Step 2: Convert to fraction form
    400,729.68/553,090.46 = 368,413.11/x
  3. Step 3: Cross multiply
    400,729.68x = 553,090.46 × 368,413.11
  4. Step 4: Simplify right side
    400,729.68x = 203,765,774,637.87
  5. Step 5: Solve for x
    x = 203,765,774,637.87/400,729.68
  6. Step 6: Final answer
    x = 508,486.85

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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.