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Finding the Fourth Proportional to 647,348.12, 893,445.66 and 389,485.70

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Solution

The fourth proportional to 647,348.12, 893,445.66 and 389,485.70 is: 537,553.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,348.12 : 893,445.66 = 389,485.70 : x
  2. Step 2: Convert to fraction form
    647,348.12/893,445.66 = 389,485.70/x
  3. Step 3: Cross multiply
    647,348.12x = 893,445.66 × 389,485.70
  4. Step 4: Simplify right side
    647,348.12x = 347,984,308,297.06
  5. Step 5: Solve for x
    x = 347,984,308,297.06/647,348.12
  6. Step 6: Final answer
    x = 537,553.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.