Home / 716,277.69-988,442.57-393,987.76

Finding the Fourth Proportional to 716,277.69, 988,442.57 and 393,987.76

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Solution

The fourth proportional to 716,277.69, 988,442.57 and 393,987.76 is: 543,691.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,277.69 : 988,442.57 = 393,987.76 : x
  2. Step 2: Convert to fraction form
    716,277.69/988,442.57 = 393,987.76/x
  3. Step 3: Cross multiply
    716,277.69x = 988,442.57 × 393,987.76
  4. Step 4: Simplify right side
    716,277.69x = 389,434,272,556.81
  5. Step 5: Solve for x
    x = 389,434,272,556.81/716,277.69
  6. Step 6: Final answer
    x = 543,691.75

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Half scale
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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.