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Finding the Fourth Proportional to 642,608.78, 885,693.22 and 427,364.24

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Solution

The fourth proportional to 642,608.78, 885,693.22 and 427,364.24 is: 589,026.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,608.78 : 885,693.22 = 427,364.24 : x
  2. Step 2: Convert to fraction form
    642,608.78/885,693.22 = 427,364.24/x
  3. Step 3: Cross multiply
    642,608.78x = 885,693.22 × 427,364.24
  4. Step 4: Simplify right side
    642,608.78x = 378,513,604,341.58
  5. Step 5: Solve for x
    x = 378,513,604,341.58/642,608.78
  6. Step 6: Final answer
    x = 589,026.51

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1.5x scale

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.