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Finding the Fourth Proportional to 638,548.47, 881,203.77 and 348,157.64

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Solution

The fourth proportional to 638,548.47, 881,203.77 and 348,157.64 is: 480,461.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,548.47 : 881,203.77 = 348,157.64 : x
  2. Step 2: Convert to fraction form
    638,548.47/881,203.77 = 348,157.64/x
  3. Step 3: Cross multiply
    638,548.47x = 881,203.77 × 348,157.64
  4. Step 4: Simplify right side
    638,548.47x = 306,797,820,516.28
  5. Step 5: Solve for x
    x = 306,797,820,516.28/638,548.47
  6. Step 6: Final answer
    x = 480,461.29

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Double scale
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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.