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Finding the Fourth Proportional to 570,158,341.88, 786,818,511.79 and 309,397,957.88

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Solution

The fourth proportional to 570,158,341.88, 786,818,511.79 and 309,397,957.88 is: 426,969,181.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,158,341.88 : 786,818,511.79 = 309,397,957.88 : x
  2. Step 2: Convert to fraction form
    570,158,341.88/786,818,511.79 = 309,397,957.88/x
  3. Step 3: Cross multiply
    570,158,341.88x = 786,818,511.79 × 309,397,957.88
  4. Step 4: Simplify right side
    570,158,341.88x = 243,440,040,765,299,136
  5. Step 5: Solve for x
    x = 243,440,040,765,299,136/570,158,341.88
  6. Step 6: Final answer
    x = 426,969,181.87

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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.