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Finding the Fourth Proportional to 258,886.81, 388,374.50 and 118,657.45

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Solution

The fourth proportional to 258,886.81, 388,374.50 and 118,657.45 is: 178,006.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,886.81 : 388,374.50 = 118,657.45 : x
  2. Step 2: Convert to fraction form
    258,886.81/388,374.50 = 118,657.45/x
  3. Step 3: Cross multiply
    258,886.81x = 388,374.50 × 118,657.45
  4. Step 4: Simplify right side
    258,886.81x = 46,083,527,815.03
  5. Step 5: Solve for x
    x = 46,083,527,815.03/258,886.81
  6. Step 6: Final answer
    x = 178,006.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.