Home / 642,581.80-886,768.10-356,106.60

Finding the Fourth Proportional to 642,581.80, 886,768.10 and 356,106.60

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Solution

The fourth proportional to 642,581.80, 886,768.10 and 356,106.60 is: 491,430.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,581.80 : 886,768.10 = 356,106.60 : x
  2. Step 2: Convert to fraction form
    642,581.80/886,768.10 = 356,106.60/x
  3. Step 3: Cross multiply
    642,581.80x = 886,768.10 × 356,106.60
  4. Step 4: Simplify right side
    642,581.80x = 315,783,973,079.46
  5. Step 5: Solve for x
    x = 315,783,973,079.46/642,581.80
  6. Step 6: Final answer
    x = 491,430.00

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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.