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Finding the Fourth Proportional to 518,672.70, 778,009.05 and 144,695.70

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Solution

The fourth proportional to 518,672.70, 778,009.05 and 144,695.70 is: 217,043.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,672.70 : 778,009.05 = 144,695.70 : x
  2. Step 2: Convert to fraction form
    518,672.70/778,009.05 = 144,695.70/x
  3. Step 3: Cross multiply
    518,672.70x = 778,009.05 × 144,695.70
  4. Step 4: Simplify right side
    518,672.70x = 112,574,564,096.09
  5. Step 5: Solve for x
    x = 112,574,564,096.09/518,672.70
  6. Step 6: Final answer
    x = 217,043.55

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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.