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Finding the Fourth Proportional to 879,063,754.40, 1,318,595,631.60 and 265,742,640.80

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Solution

The fourth proportional to 879,063,754.40, 1,318,595,631.60 and 265,742,640.80 is: 398,613,961.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,063,754.40 : 1,318,595,631.60 = 265,742,640.80 : x
  2. Step 2: Convert to fraction form
    879,063,754.40/1,318,595,631.60 = 265,742,640.80/x
  3. Step 3: Cross multiply
    879,063,754.40x = 1,318,595,631.60 × 265,742,640.80
  4. Step 4: Simplify right side
    879,063,754.40x = 350,407,085,288,727,936
  5. Step 5: Solve for x
    x = 350,407,085,288,727,936/879,063,754.40
  6. Step 6: Final answer
    x = 398,613,961.20

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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.