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Finding the Fourth Proportional to 638,445.68, 881,061 and 351,975.92

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Solution

The fourth proportional to 638,445.68, 881,061 and 351,975.92 is: 485,730.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,445.68 : 881,061 = 351,975.92 : x
  2. Step 2: Convert to fraction form
    638,445.68/881,061 = 351,975.92/x
  3. Step 3: Cross multiply
    638,445.68x = 881,061 × 351,975.92
  4. Step 4: Simplify right side
    638,445.68x = 310,112,256,051.12
  5. Step 5: Solve for x
    x = 310,112,256,051.12/638,445.68
  6. Step 6: Final answer
    x = 485,730.06

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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.