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Finding the Fourth Proportional to 647,554.80, 970,911.72 and 310,587.60

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Solution

The fourth proportional to 647,554.80, 970,911.72 and 310,587.60 is: 465,679.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,554.80 : 970,911.72 = 310,587.60 : x
  2. Step 2: Convert to fraction form
    647,554.80/970,911.72 = 310,587.60/x
  3. Step 3: Cross multiply
    647,554.80x = 970,911.72 × 310,587.60
  4. Step 4: Simplify right side
    647,554.80x = 301,553,140,926.67
  5. Step 5: Solve for x
    x = 301,553,140,926.67/647,554.80
  6. Step 6: Final answer
    x = 465,679.72

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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.