Home / 865,830.40-1,298,745.60-393,438.40

Finding the Fourth Proportional to 865,830.40, 1,298,745.60 and 393,438.40

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Solution

The fourth proportional to 865,830.40, 1,298,745.60 and 393,438.40 is: 590,157.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,830.40 : 1,298,745.60 = 393,438.40 : x
  2. Step 2: Convert to fraction form
    865,830.40/1,298,745.60 = 393,438.40/x
  3. Step 3: Cross multiply
    865,830.40x = 1,298,745.60 × 393,438.40
  4. Step 4: Simplify right side
    865,830.40x = 510,976,390,871.04
  5. Step 5: Solve for x
    x = 510,976,390,871.04/865,830.40
  6. Step 6: Final answer
    x = 590,157.60

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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.