Home / 865,810.40-1,298,715.60-393,418.40

Finding the Fourth Proportional to 865,810.40, 1,298,715.60 and 393,418.40

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Solution

The fourth proportional to 865,810.40, 1,298,715.60 and 393,418.40 is: 590,127.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,810.40 : 1,298,715.60 = 393,418.40 : x
  2. Step 2: Convert to fraction form
    865,810.40/1,298,715.60 = 393,418.40/x
  3. Step 3: Cross multiply
    865,810.40x = 1,298,715.60 × 393,418.40
  4. Step 4: Simplify right side
    865,810.40x = 510,938,613,407.04
  5. Step 5: Solve for x
    x = 510,938,613,407.04/865,810.40
  6. Step 6: Final answer
    x = 590,127.60

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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.