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Finding the Fourth Proportional to 398,395.13, 549,785.27 and 219,547.13

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Solution

The fourth proportional to 398,395.13, 549,785.27 and 219,547.13 is: 302,975.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,395.13 : 549,785.27 = 219,547.13 : x
  2. Step 2: Convert to fraction form
    398,395.13/549,785.27 = 219,547.13/x
  3. Step 3: Cross multiply
    398,395.13x = 549,785.27 × 219,547.13
  4. Step 4: Simplify right side
    398,395.13x = 120,703,775,944.72
  5. Step 5: Solve for x
    x = 120,703,775,944.72/398,395.13
  6. Step 6: Final answer
    x = 302,975.03

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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.