Home / 647,519.10-971,307.45-221,048.70

Finding the Fourth Proportional to 647,519.10, 971,307.45 and 221,048.70

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Solution

The fourth proportional to 647,519.10, 971,307.45 and 221,048.70 is: 331,582.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,519.10 : 971,307.45 = 221,048.70 : x
  2. Step 2: Convert to fraction form
    647,519.10/971,307.45 = 221,048.70/x
  3. Step 3: Cross multiply
    647,519.10x = 971,307.45 × 221,048.70
  4. Step 4: Simplify right side
    647,519.10x = 214,706,249,122.82
  5. Step 5: Solve for x
    x = 214,706,249,122.82/647,519.10
  6. Step 6: Final answer
    x = 331,582.88

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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.