Home / 398,128.40-549,427.60-216,847.20

Finding the Fourth Proportional to 398,128.40, 549,427.60 and 216,847.20

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Solution

The fourth proportional to 398,128.40, 549,427.60 and 216,847.20 is: 299,254.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,128.40 : 549,427.60 = 216,847.20 : x
  2. Step 2: Convert to fraction form
    398,128.40/549,427.60 = 216,847.20/x
  3. Step 3: Cross multiply
    398,128.40x = 549,427.60 × 216,847.20
  4. Step 4: Simplify right side
    398,128.40x = 119,141,836,662.72
  5. Step 5: Solve for x
    x = 119,141,836,662.72/398,128.40
  6. Step 6: Final answer
    x = 299,254.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.