Home / 398,616.03-549,779.09-255,389.49

Finding the Fourth Proportional to 398,616.03, 549,779.09 and 255,389.49

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Solution

The fourth proportional to 398,616.03, 549,779.09 and 255,389.49 is: 352,238.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,616.03 : 549,779.09 = 255,389.49 : x
  2. Step 2: Convert to fraction form
    398,616.03/549,779.09 = 255,389.49/x
  3. Step 3: Cross multiply
    398,616.03x = 549,779.09 × 255,389.49
  4. Step 4: Simplify right side
    398,616.03x = 140,407,800,130.82
  5. Step 5: Solve for x
    x = 140,407,800,130.82/398,616.03
  6. Step 6: Final answer
    x = 352,238.22

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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.