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Finding the Fourth Proportional to 532,419.40, 798,789.18 and 319,421.80

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Solution

The fourth proportional to 532,419.40, 798,789.18 and 319,421.80 is: 479,228.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    532,419.40 : 798,789.18 = 319,421.80 : x
  2. Step 2: Convert to fraction form
    532,419.40/798,789.18 = 319,421.80/x
  3. Step 3: Cross multiply
    532,419.40x = 798,789.18 × 319,421.80
  4. Step 4: Simplify right side
    532,419.40x = 255,150,677,696.12
  5. Step 5: Solve for x
    x = 255,150,677,696.12/532,419.40
  6. Step 6: Final answer
    x = 479,228.74

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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.