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Finding the Fourth Proportional to 517,085.60, 775,628.40 and 138,005.60

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Solution

The fourth proportional to 517,085.60, 775,628.40 and 138,005.60 is: 207,008.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    517,085.60 : 775,628.40 = 138,005.60 : x
  2. Step 2: Convert to fraction form
    517,085.60/775,628.40 = 138,005.60/x
  3. Step 3: Cross multiply
    517,085.60x = 775,628.40 × 138,005.60
  4. Step 4: Simplify right side
    517,085.60x = 107,041,062,719.04
  5. Step 5: Solve for x
    x = 107,041,062,719.04/517,085.60
  6. Step 6: Final answer
    x = 207,008.40

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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.