Home / 386,412.20-579,618.30-355,999.40

Finding the Fourth Proportional to 386,412.20, 579,618.30 and 355,999.40

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Solution

The fourth proportional to 386,412.20, 579,618.30 and 355,999.40 is: 533,999.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,412.20 : 579,618.30 = 355,999.40 : x
  2. Step 2: Convert to fraction form
    386,412.20/579,618.30 = 355,999.40/x
  3. Step 3: Cross multiply
    386,412.20x = 579,618.30 × 355,999.40
  4. Step 4: Simplify right side
    386,412.20x = 206,343,767,029.02
  5. Step 5: Solve for x
    x = 206,343,767,029.02/386,412.20
  6. Step 6: Final answer
    x = 533,999.10

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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.