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Finding the Fourth Proportional to 658,543.80, 987,815.70 and 445,967.40

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Solution

The fourth proportional to 658,543.80, 987,815.70 and 445,967.40 is: 668,951.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,543.80 : 987,815.70 = 445,967.40 : x
  2. Step 2: Convert to fraction form
    658,543.80/987,815.70 = 445,967.40/x
  3. Step 3: Cross multiply
    658,543.80x = 987,815.70 × 445,967.40
  4. Step 4: Simplify right side
    658,543.80x = 440,533,599,408.18
  5. Step 5: Solve for x
    x = 440,533,599,408.18/658,543.80
  6. Step 6: Final answer
    x = 668,951.10

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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.