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Finding the Fourth Proportional to 6,387,640.48, 8,792,569.74 and 5,570,402.32

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Solution

The fourth proportional to 6,387,640.48, 8,792,569.74 and 5,570,402.32 is: 7,667,643.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,387,640.48 : 8,792,569.74 = 5,570,402.32 : x
  2. Step 2: Convert to fraction form
    6,387,640.48/8,792,569.74 = 5,570,402.32/x
  3. Step 3: Cross multiply
    6,387,640.48x = 8,792,569.74 × 5,570,402.32
  4. Step 4: Simplify right side
    6,387,640.48x = 48,978,150,878,457.80
  5. Step 5: Solve for x
    x = 48,978,150,878,457.80/6,387,640.48
  6. Step 6: Final answer
    x = 7,667,643.64

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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.