Home / 687,041.19-947,245.05-491,041.59

Finding the Fourth Proportional to 687,041.19, 947,245.05 and 491,041.59

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Solution

The fourth proportional to 687,041.19, 947,245.05 and 491,041.59 is: 677,014.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,041.19 : 947,245.05 = 491,041.59 : x
  2. Step 2: Convert to fraction form
    687,041.19/947,245.05 = 491,041.59/x
  3. Step 3: Cross multiply
    687,041.19x = 947,245.05 × 491,041.59
  4. Step 4: Simplify right side
    687,041.19x = 465,136,715,471.63
  5. Step 5: Solve for x
    x = 465,136,715,471.63/687,041.19
  6. Step 6: Final answer
    x = 677,014.31

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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.