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Finding the Fourth Proportional to 570,740,842.32, 787,626,393.48 and 309,980,458.32

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Solution

The fourth proportional to 570,740,842.32, 787,626,393.48 and 309,980,458.32 is: 427,775,221.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,740,842.32 : 787,626,393.48 = 309,980,458.32 : x
  2. Step 2: Convert to fraction form
    570,740,842.32/787,626,393.48 = 309,980,458.32/x
  3. Step 3: Cross multiply
    570,740,842.32x = 787,626,393.48 × 309,980,458.32
  4. Step 4: Simplify right side
    570,740,842.32x = 244,148,790,435,859,072
  5. Step 5: Solve for x
    x = 244,148,790,435,859,072/570,740,842.32
  6. Step 6: Final answer
    x = 427,775,221.84

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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.