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Finding the Fourth Proportional to 710,282.31, 980,173.47 and 387,993.84

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Solution

The fourth proportional to 710,282.31, 980,173.47 and 387,993.84 is: 535,422.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,282.31 : 980,173.47 = 387,993.84 : x
  2. Step 2: Convert to fraction form
    710,282.31/980,173.47 = 387,993.84/x
  3. Step 3: Cross multiply
    710,282.31x = 980,173.47 × 387,993.84
  4. Step 4: Simplify right side
    710,282.31x = 380,301,268,491.43
  5. Step 5: Solve for x
    x = 380,301,268,491.43/710,282.31
  6. Step 6: Final answer
    x = 535,422.69

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Similar ratio
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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.