Home / 642,784.51-886,790.23-413,305.34

Finding the Fourth Proportional to 642,784.51, 886,790.23 and 413,305.34

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Solution

The fourth proportional to 642,784.51, 886,790.23 and 413,305.34 is: 570,199.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,784.51 : 886,790.23 = 413,305.34 : x
  2. Step 2: Convert to fraction form
    642,784.51/886,790.23 = 413,305.34/x
  3. Step 3: Cross multiply
    642,784.51x = 886,790.23 × 413,305.34
  4. Step 4: Simplify right side
    642,784.51x = 366,515,132,051.61
  5. Step 5: Solve for x
    x = 366,515,132,051.61/642,784.51
  6. Step 6: Final answer
    x = 570,199.07

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Double scale
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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.