Home / 921,448.53-1,272,100.82-636,501.87

Finding the Fourth Proportional to 921,448.53, 1,272,100.82 and 636,501.87

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Solution

The fourth proportional to 921,448.53, 1,272,100.82 and 636,501.87 is: 878,719.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,448.53 : 1,272,100.82 = 636,501.87 : x
  2. Step 2: Convert to fraction form
    921,448.53/1,272,100.82 = 636,501.87/x
  3. Step 3: Cross multiply
    921,448.53x = 1,272,100.82 × 636,501.87
  4. Step 4: Simplify right side
    921,448.53x = 809,694,547,576.02
  5. Step 5: Solve for x
    x = 809,694,547,576.02/921,448.53
  6. Step 6: Final answer
    x = 878,719.24

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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.