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Finding the Fourth Proportional to 658,051.20, 987,220.80 and 258,691.20

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Solution

The fourth proportional to 658,051.20, 987,220.80 and 258,691.20 is: 388,093.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,051.20 : 987,220.80 = 258,691.20 : x
  2. Step 2: Convert to fraction form
    658,051.20/987,220.80 = 258,691.20/x
  3. Step 3: Cross multiply
    658,051.20x = 987,220.80 × 258,691.20
  4. Step 4: Simplify right side
    658,051.20x = 255,385,333,416.96
  5. Step 5: Solve for x
    x = 255,385,333,416.96/658,051.20
  6. Step 6: Final answer
    x = 388,093.41

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1.5x scale

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.