Home / 686,986.40-1,029,999.60-406,359.20

Finding the Fourth Proportional to 686,986.40, 1,029,999.60 and 406,359.20

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Solution

The fourth proportional to 686,986.40, 1,029,999.60 and 406,359.20 is: 609,254.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,986.40 : 1,029,999.60 = 406,359.20 : x
  2. Step 2: Convert to fraction form
    686,986.40/1,029,999.60 = 406,359.20/x
  3. Step 3: Cross multiply
    686,986.40x = 1,029,999.60 × 406,359.20
  4. Step 4: Simplify right side
    686,986.40x = 418,549,813,456.32
  5. Step 5: Solve for x
    x = 418,549,813,456.32/686,986.40
  6. Step 6: Final answer
    x = 609,254.88

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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.