Home / 679,321.05-1,019,258.34-342,458.79

Finding the Fourth Proportional to 679,321.05, 1,019,258.34 and 342,458.79

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Solution

The fourth proportional to 679,321.05, 1,019,258.34 and 342,458.79 is: 513,827.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,321.05 : 1,019,258.34 = 342,458.79 : x
  2. Step 2: Convert to fraction form
    679,321.05/1,019,258.34 = 342,458.79/x
  3. Step 3: Cross multiply
    679,321.05x = 1,019,258.34 × 342,458.79
  4. Step 4: Simplify right side
    679,321.05x = 349,053,977,813.81
  5. Step 5: Solve for x
    x = 349,053,977,813.81/679,321.05
  6. Step 6: Final answer
    x = 513,827.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.