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Finding the Fourth Proportional to 647,980.20, 971,970.30 and 448,525.80

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Solution

The fourth proportional to 647,980.20, 971,970.30 and 448,525.80 is: 672,788.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,980.20 : 971,970.30 = 448,525.80 : x
  2. Step 2: Convert to fraction form
    647,980.20/971,970.30 = 448,525.80/x
  3. Step 3: Cross multiply
    647,980.20x = 971,970.30 × 448,525.80
  4. Step 4: Simplify right side
    647,980.20x = 435,953,756,383.74
  5. Step 5: Solve for x
    x = 435,953,756,383.74/647,980.20
  6. Step 6: Final answer
    x = 672,788.70

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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.