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Finding the Fourth Proportional to 879,063,932.90, 1,318,595,899.35 and 265,742,819.30

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Solution

The fourth proportional to 879,063,932.90, 1,318,595,899.35 and 265,742,819.30 is: 398,614,228.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,063,932.90 : 1,318,595,899.35 = 265,742,819.30 : x
  2. Step 2: Convert to fraction form
    879,063,932.90/1,318,595,899.35 = 265,742,819.30/x
  3. Step 3: Cross multiply
    879,063,932.90x = 1,318,595,899.35 × 265,742,819.30
  4. Step 4: Simplify right side
    879,063,932.90x = 350,407,391,810,688,000
  5. Step 5: Solve for x
    x = 350,407,391,810,688,000/879,063,932.90
  6. Step 6: Final answer
    x = 398,614,228.95

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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.