Home / 947,999.20-1,421,480.40-386,399.20

Finding the Fourth Proportional to 947,999.20, 1,421,480.40 and 386,399.20

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Solution

The fourth proportional to 947,999.20, 1,421,480.40 and 386,399.20 is: 579,387.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    947,999.20 : 1,421,480.40 = 386,399.20 : x
  2. Step 2: Convert to fraction form
    947,999.20/1,421,480.40 = 386,399.20/x
  3. Step 3: Cross multiply
    947,999.20x = 1,421,480.40 × 386,399.20
  4. Step 4: Simplify right side
    947,999.20x = 549,258,889,375.68
  5. Step 5: Solve for x
    x = 549,258,889,375.68/947,999.20
  6. Step 6: Final answer
    x = 579,387.50

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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.