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Finding the Fourth Proportional to 749,993.70, 1,121,710.05 and 670,605.60

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Solution

The fourth proportional to 749,993.70, 1,121,710.05 and 670,605.60 is: 1,002,975.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    749,993.70 : 1,121,710.05 = 670,605.60 : x
  2. Step 2: Convert to fraction form
    749,993.70/1,121,710.05 = 670,605.60/x
  3. Step 3: Cross multiply
    749,993.70x = 1,121,710.05 × 670,605.60
  4. Step 4: Simplify right side
    749,993.70x = 752,225,041,106.28
  5. Step 5: Solve for x
    x = 752,225,041,106.28/749,993.70
  6. Step 6: Final answer
    x = 1,002,975.15

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Double scale
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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.