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Finding the Fourth Proportional to 573,503.20, 791,421.40 and 311,852.80

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Solution

The fourth proportional to 573,503.20, 791,421.40 and 311,852.80 is: 430,349.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    573,503.20 : 791,421.40 = 311,852.80 : x
  2. Step 2: Convert to fraction form
    573,503.20/791,421.40 = 311,852.80/x
  3. Step 3: Cross multiply
    573,503.20x = 791,421.40 × 311,852.80
  4. Step 4: Simplify right side
    573,503.20x = 246,806,979,569.92
  5. Step 5: Solve for x
    x = 246,806,979,569.92/573,503.20
  6. Step 6: Final answer
    x = 430,349.79

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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.