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Finding the Fourth Proportional to 647,560.20, 971,340.30 and 579,325.80

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Solution

The fourth proportional to 647,560.20, 971,340.30 and 579,325.80 is: 868,988.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,560.20 : 971,340.30 = 579,325.80 : x
  2. Step 2: Convert to fraction form
    647,560.20/971,340.30 = 579,325.80/x
  3. Step 3: Cross multiply
    647,560.20x = 971,340.30 × 579,325.80
  4. Step 4: Simplify right side
    647,560.20x = 562,722,496,369.74
  5. Step 5: Solve for x
    x = 562,722,496,369.74/647,560.20
  6. Step 6: Final answer
    x = 868,988.70

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Double scale
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Similar ratio
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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.