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Finding the Fourth Proportional to 618,967.58, 928,713.90 and 338,156.78

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Solution

The fourth proportional to 618,967.58, 928,713.90 and 338,156.78 is: 507,378.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,967.58 : 928,713.90 = 338,156.78 : x
  2. Step 2: Convert to fraction form
    618,967.58/928,713.90 = 338,156.78/x
  3. Step 3: Cross multiply
    618,967.58x = 928,713.90 × 338,156.78
  4. Step 4: Simplify right side
    618,967.58x = 314,050,901,965.24
  5. Step 5: Solve for x
    x = 314,050,901,965.24/618,967.58
  6. Step 6: Final answer
    x = 507,378.60

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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.