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Finding the Fourth Proportional to 813,888,921.80, 1,140,975,040.60 and 813,888,921.80

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Solution

The fourth proportional to 813,888,921.80, 1,140,975,040.60 and 813,888,921.80 is: 1,140,975,040.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,888,921.80 : 1,140,975,040.60 = 813,888,921.80 : x
  2. Step 2: Convert to fraction form
    813,888,921.80/1,140,975,040.60 = 813,888,921.80/x
  3. Step 3: Cross multiply
    813,888,921.80x = 1,140,975,040.60 × 813,888,921.80
  4. Step 4: Simplify right side
    813,888,921.80x = 928,626,945,594,645,120
  5. Step 5: Solve for x
    x = 928,626,945,594,645,120/813,888,921.80
  6. Step 6: Final answer
    x = 1,140,975,040.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.