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Finding the Fourth Proportional to 647,530.10, 971,323.95 and 221,059.70

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Solution

The fourth proportional to 647,530.10, 971,323.95 and 221,059.70 is: 331,599.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,530.10 : 971,323.95 = 221,059.70 : x
  2. Step 2: Convert to fraction form
    647,530.10/971,323.95 = 221,059.70/x
  3. Step 3: Cross multiply
    647,530.10x = 971,323.95 × 221,059.70
  4. Step 4: Simplify right side
    647,530.10x = 214,720,580,989.82
  5. Step 5: Solve for x
    x = 214,720,580,989.82/647,530.10
  6. Step 6: Final answer
    x = 331,599.38

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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.