Home / 827,113.20-1,240,669.80-328,477.20

Finding the Fourth Proportional to 827,113.20, 1,240,669.80 and 328,477.20

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Solution

The fourth proportional to 827,113.20, 1,240,669.80 and 328,477.20 is: 492,715.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    827,113.20 : 1,240,669.80 = 328,477.20 : x
  2. Step 2: Convert to fraction form
    827,113.20/1,240,669.80 = 328,477.20/x
  3. Step 3: Cross multiply
    827,113.20x = 1,240,669.80 × 328,477.20
  4. Step 4: Simplify right side
    827,113.20x = 407,531,742,028.56
  5. Step 5: Solve for x
    x = 407,531,742,028.56/827,113.20
  6. Step 6: Final answer
    x = 492,715.80

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.