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Finding the Fourth Proportional to 388,471.41, 536,051.93 and 286,551.95

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Solution

The fourth proportional to 388,471.41, 536,051.93 and 286,551.95 is: 395,413.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,471.41 : 536,051.93 = 286,551.95 : x
  2. Step 2: Convert to fraction form
    388,471.41/536,051.93 = 286,551.95/x
  3. Step 3: Cross multiply
    388,471.41x = 536,051.93 × 286,551.95
  4. Step 4: Simplify right side
    388,471.41x = 153,606,721,729.74
  5. Step 5: Solve for x
    x = 153,606,721,729.74/388,471.41
  6. Step 6: Final answer
    x = 395,413.20

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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.