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Finding the Fourth Proportional to 638,258.74, 880,802.40 and 351,779.56

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Solution

The fourth proportional to 638,258.74, 880,802.40 and 351,779.56 is: 485,458.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,258.74 : 880,802.40 = 351,779.56 : x
  2. Step 2: Convert to fraction form
    638,258.74/880,802.40 = 351,779.56/x
  3. Step 3: Cross multiply
    638,258.74x = 880,802.40 × 351,779.56
  4. Step 4: Simplify right side
    638,258.74x = 309,848,279,836.11
  5. Step 5: Solve for x
    x = 309,848,279,836.11/638,258.74
  6. Step 6: Final answer
    x = 485,458.74

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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.