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Finding the Fourth Proportional to 257,543.70, 386,315.55 and 163,065.30

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Solution

The fourth proportional to 257,543.70, 386,315.55 and 163,065.30 is: 244,597.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,543.70 : 386,315.55 = 163,065.30 : x
  2. Step 2: Convert to fraction form
    257,543.70/386,315.55 = 163,065.30/x
  3. Step 3: Cross multiply
    257,543.70x = 386,315.55 × 163,065.30
  4. Step 4: Simplify right side
    257,543.70x = 62,994,661,055.42
  5. Step 5: Solve for x
    x = 62,994,661,055.42/257,543.70
  6. Step 6: Final answer
    x = 244,597.95

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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.