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Finding the Fourth Proportional to 710,449.40, 980,408.70 and 388,152.56

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Solution

The fourth proportional to 710,449.40, 980,408.70 and 388,152.56 is: 535,644.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,449.40 : 980,408.70 = 388,152.56 : x
  2. Step 2: Convert to fraction form
    710,449.40/980,408.70 = 388,152.56/x
  3. Step 3: Cross multiply
    710,449.40x = 980,408.70 × 388,152.56
  4. Step 4: Simplify right side
    710,449.40x = 380,548,146,751.27
  5. Step 5: Solve for x
    x = 380,548,146,751.27/710,449.40
  6. Step 6: Final answer
    x = 535,644.27

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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.