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Finding the Fourth Proportional to 398,370.82, 549,746.73 and 217,090.66

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Solution

The fourth proportional to 398,370.82, 549,746.73 and 217,090.66 is: 299,582.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,370.82 : 549,746.73 = 217,090.66 : x
  2. Step 2: Convert to fraction form
    398,370.82/549,746.73 = 217,090.66/x
  3. Step 3: Cross multiply
    398,370.82x = 549,746.73 × 217,090.66
  4. Step 4: Simplify right side
    398,370.82x = 119,344,880,448.54
  5. Step 5: Solve for x
    x = 119,344,880,448.54/398,370.82
  6. Step 6: Final answer
    x = 299,582.39

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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.