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Finding the Fourth Proportional to 579,879.80, 869,862.90 and 205,854.20

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Solution

The fourth proportional to 579,879.80, 869,862.90 and 205,854.20 is: 308,796.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,879.80 : 869,862.90 = 205,854.20 : x
  2. Step 2: Convert to fraction form
    579,879.80/869,862.90 = 205,854.20/x
  3. Step 3: Cross multiply
    579,879.80x = 869,862.90 × 205,854.20
  4. Step 4: Simplify right side
    579,879.80x = 179,064,931,389.18
  5. Step 5: Solve for x
    x = 179,064,931,389.18/579,879.80
  6. Step 6: Final answer
    x = 308,796.64

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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.