Home / 865,713.40-1,298,570.10-393,321.40

Finding the Fourth Proportional to 865,713.40, 1,298,570.10 and 393,321.40

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Solution

The fourth proportional to 865,713.40, 1,298,570.10 and 393,321.40 is: 589,982.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,713.40 : 1,298,570.10 = 393,321.40 : x
  2. Step 2: Convert to fraction form
    865,713.40/1,298,570.10 = 393,321.40/x
  3. Step 3: Cross multiply
    865,713.40x = 1,298,570.10 × 393,321.40
  4. Step 4: Simplify right side
    865,713.40x = 510,755,409,730.14
  5. Step 5: Solve for x
    x = 510,755,409,730.14/865,713.40
  6. Step 6: Final answer
    x = 589,982.10

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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.