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Finding the Fourth Proportional to 891,709.40, 1,230,558.86 and 509,744.76

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Solution

The fourth proportional to 891,709.40, 1,230,558.86 and 509,744.76 is: 703,447.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    891,709.40 : 1,230,558.86 = 509,744.76 : x
  2. Step 2: Convert to fraction form
    891,709.40/1,230,558.86 = 509,744.76/x
  3. Step 3: Cross multiply
    891,709.40x = 1,230,558.86 × 509,744.76
  4. Step 4: Simplify right side
    891,709.40x = 627,270,930,756.57
  5. Step 5: Solve for x
    x = 627,270,930,756.57/891,709.40
  6. Step 6: Final answer
    x = 703,447.70

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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.