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Finding the Fourth Proportional to 863,640.90, 1,191,770.69 and 476,461.31

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Solution

The fourth proportional to 863,640.90, 1,191,770.69 and 476,461.31 is: 657,486.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    863,640.90 : 1,191,770.69 = 476,461.31 : x
  2. Step 2: Convert to fraction form
    863,640.90/1,191,770.69 = 476,461.31/x
  3. Step 3: Cross multiply
    863,640.90x = 1,191,770.69 × 476,461.31
  4. Step 4: Simplify right side
    863,640.90x = 567,832,615,835.84
  5. Step 5: Solve for x
    x = 567,832,615,835.84/863,640.90
  6. Step 6: Final answer
    x = 657,486.94

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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.