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Finding the Fourth Proportional to 647,547.80, 971,321.70 and 629,115.80

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Solution

The fourth proportional to 647,547.80, 971,321.70 and 629,115.80 is: 943,673.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,547.80 : 971,321.70 = 629,115.80 : x
  2. Step 2: Convert to fraction form
    647,547.80/971,321.70 = 629,115.80/x
  3. Step 3: Cross multiply
    647,547.80x = 971,321.70 × 629,115.80
  4. Step 4: Simplify right side
    647,547.80x = 611,073,828,352.86
  5. Step 5: Solve for x
    x = 611,073,828,352.86/647,547.80
  6. Step 6: Final answer
    x = 943,673.70

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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.