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Finding the Fourth Proportional to 638,485.84, 881,083.92 and 348,091.12

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Solution

The fourth proportional to 638,485.84, 881,083.92 and 348,091.12 is: 480,351.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,485.84 : 881,083.92 = 348,091.12 : x
  2. Step 2: Convert to fraction form
    638,485.84/881,083.92 = 348,091.12/x
  3. Step 3: Cross multiply
    638,485.84x = 881,083.92 × 348,091.12
  4. Step 4: Simplify right side
    638,485.84x = 306,697,488,526.79
  5. Step 5: Solve for x
    x = 306,697,488,526.79/638,485.84
  6. Step 6: Final answer
    x = 480,351.28

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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.