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Finding the Fourth Proportional to 289,498.88, 399,703.48 and 180,768.80

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Solution

The fourth proportional to 289,498.88, 399,703.48 and 180,768.80 is: 249,582.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,498.88 : 399,703.48 = 180,768.80 : x
  2. Step 2: Convert to fraction form
    289,498.88/399,703.48 = 180,768.80/x
  3. Step 3: Cross multiply
    289,498.88x = 399,703.48 × 180,768.80
  4. Step 4: Simplify right side
    289,498.88x = 72,253,918,435.42
  5. Step 5: Solve for x
    x = 72,253,918,435.42/289,498.88
  6. Step 6: Final answer
    x = 249,582.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.