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Finding the Fourth Proportional to 570,158,688.96, 786,818,990.70 and 309,398,304.96

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Solution

The fourth proportional to 570,158,688.96, 786,818,990.70 and 309,398,304.96 is: 426,969,660.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,158,688.96 : 786,818,990.70 = 309,398,304.96 : x
  2. Step 2: Convert to fraction form
    570,158,688.96/786,818,990.70 = 309,398,304.96/x
  3. Step 3: Cross multiply
    570,158,688.96x = 786,818,990.70 × 309,398,304.96
  4. Step 4: Simplify right side
    570,158,688.96x = 243,440,462,032,918,016
  5. Step 5: Solve for x
    x = 243,440,462,032,918,016/570,158,688.96
  6. Step 6: Final answer
    x = 426,969,660.81

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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.