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Finding the Fourth Proportional to 518,614.56, 778,227.96 and 219,075.72

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Solution

The fourth proportional to 518,614.56, 778,227.96 and 219,075.72 is: 328,742.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,614.56 : 778,227.96 = 219,075.72 : x
  2. Step 2: Convert to fraction form
    518,614.56/778,227.96 = 219,075.72/x
  3. Step 3: Cross multiply
    518,614.56x = 778,227.96 × 219,075.72
  4. Step 4: Simplify right side
    518,614.56x = 170,490,850,661.13
  5. Step 5: Solve for x
    x = 170,490,850,661.13/518,614.56
  6. Step 6: Final answer
    x = 328,742.89

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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.