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Finding the Fourth Proportional to 647,590.60, 971,385.90 and 513,746.20

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Solution

The fourth proportional to 647,590.60, 971,385.90 and 513,746.20 is: 770,619.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,590.60 : 971,385.90 = 513,746.20 : x
  2. Step 2: Convert to fraction form
    647,590.60/971,385.90 = 513,746.20/x
  3. Step 3: Cross multiply
    647,590.60x = 971,385.90 × 513,746.20
  4. Step 4: Simplify right side
    647,590.60x = 499,045,814,858.58
  5. Step 5: Solve for x
    x = 499,045,814,858.58/647,590.60
  6. Step 6: Final answer
    x = 770,619.30

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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.