Home / 717,143,455.34-989,631,840.68-399,587,293.53

Finding the Fourth Proportional to 717,143,455.34, 989,631,840.68 and 399,587,293.53

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Solution

The fourth proportional to 717,143,455.34, 989,631,840.68 and 399,587,293.53 is: 551,415,906.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,143,455.34 : 989,631,840.68 = 399,587,293.53 : x
  2. Step 2: Convert to fraction form
    717,143,455.34/989,631,840.68 = 399,587,293.53/x
  3. Step 3: Cross multiply
    717,143,455.34x = 989,631,840.68 × 399,587,293.53
  4. Step 4: Simplify right side
    717,143,455.34x = 395,444,308,807,937,856
  5. Step 5: Solve for x
    x = 395,444,308,807,937,856/717,143,455.34
  6. Step 6: Final answer
    x = 551,415,906.91

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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.