Home / 498,538.32-686,994.12-355,045.20

Finding the Fourth Proportional to 498,538.32, 686,994.12 and 355,045.20

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Solution

The fourth proportional to 498,538.32, 686,994.12 and 355,045.20 is: 489,258.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,538.32 : 686,994.12 = 355,045.20 : x
  2. Step 2: Convert to fraction form
    498,538.32/686,994.12 = 355,045.20/x
  3. Step 3: Cross multiply
    498,538.32x = 686,994.12 × 355,045.20
  4. Step 4: Simplify right side
    498,538.32x = 243,913,964,734.22
  5. Step 5: Solve for x
    x = 243,913,964,734.22/498,538.32
  6. Step 6: Final answer
    x = 489,258.21

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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.