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Finding the Fourth Proportional to 518,915.70, 778,300.65 and 163,965.60

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Solution

The fourth proportional to 518,915.70, 778,300.65 and 163,965.60 is: 245,925.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,915.70 : 778,300.65 = 163,965.60 : x
  2. Step 2: Convert to fraction form
    518,915.70/778,300.65 = 163,965.60/x
  3. Step 3: Cross multiply
    518,915.70x = 778,300.65 × 163,965.60
  4. Step 4: Simplify right side
    518,915.70x = 127,614,533,057.64
  5. Step 5: Solve for x
    x = 127,614,533,057.64/518,915.70
  6. Step 6: Final answer
    x = 245,925.37

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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.