Home / 712,805.69-1,069,208.13-665,566.49

Finding the Fourth Proportional to 712,805.69, 1,069,208.13 and 665,566.49

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Solution

The fourth proportional to 712,805.69, 1,069,208.13 and 665,566.49 is: 998,349.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,805.69 : 1,069,208.13 = 665,566.49 : x
  2. Step 2: Convert to fraction form
    712,805.69/1,069,208.13 = 665,566.49/x
  3. Step 3: Cross multiply
    712,805.69x = 1,069,208.13 × 665,566.49
  4. Step 4: Simplify right side
    712,805.69x = 711,629,102,163.56
  5. Step 5: Solve for x
    x = 711,629,102,163.56/712,805.69
  6. Step 6: Final answer
    x = 998,349.36

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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.