Home / 976,537.90-1,347,025.98-645,393.30

Finding the Fourth Proportional to 976,537.90, 1,347,025.98 and 645,393.30

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Solution

The fourth proportional to 976,537.90, 1,347,025.98 and 645,393.30 is: 890,248.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    976,537.90 : 1,347,025.98 = 645,393.30 : x
  2. Step 2: Convert to fraction form
    976,537.90/1,347,025.98 = 645,393.30/x
  3. Step 3: Cross multiply
    976,537.90x = 1,347,025.98 × 645,393.30
  4. Step 4: Simplify right side
    976,537.90x = 869,361,542,417.93
  5. Step 5: Solve for x
    x = 869,361,542,417.93/976,537.90
  6. Step 6: Final answer
    x = 890,248.65

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Double scale
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Similar ratio
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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.