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Finding the Fourth Proportional to 487,405.80, 731,108.70 and 155,015.40

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Solution

The fourth proportional to 487,405.80, 731,108.70 and 155,015.40 is: 232,523.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,405.80 : 731,108.70 = 155,015.40 : x
  2. Step 2: Convert to fraction form
    487,405.80/731,108.70 = 155,015.40/x
  3. Step 3: Cross multiply
    487,405.80x = 731,108.70 × 155,015.40
  4. Step 4: Simplify right side
    487,405.80x = 113,333,107,573.98
  5. Step 5: Solve for x
    x = 113,333,107,573.98/487,405.80
  6. Step 6: Final answer
    x = 232,523.10

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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.