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Finding the Fourth Proportional to 518,628.80, 778,052.55 and 163,678.70

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Solution

The fourth proportional to 518,628.80, 778,052.55 and 163,678.70 is: 245,552.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,628.80 : 778,052.55 = 163,678.70 : x
  2. Step 2: Convert to fraction form
    518,628.80/778,052.55 = 163,678.70/x
  3. Step 3: Cross multiply
    518,628.80x = 778,052.55 × 163,678.70
  4. Step 4: Simplify right side
    518,628.80x = 127,350,629,915.69
  5. Step 5: Solve for x
    x = 127,350,629,915.69/518,628.80
  6. Step 6: Final answer
    x = 245,552.56

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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.