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Finding the Fourth Proportional to 973,999.80, 1,460,999.70 and 638,076.60

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Solution

The fourth proportional to 973,999.80, 1,460,999.70 and 638,076.60 is: 957,114.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    973,999.80 : 1,460,999.70 = 638,076.60 : x
  2. Step 2: Convert to fraction form
    973,999.80/1,460,999.70 = 638,076.60/x
  3. Step 3: Cross multiply
    973,999.80x = 1,460,999.70 × 638,076.60
  4. Step 4: Simplify right side
    973,999.80x = 932,229,721,177.02
  5. Step 5: Solve for x
    x = 932,229,721,177.02/973,999.80
  6. Step 6: Final answer
    x = 957,114.90

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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.