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Finding the Fourth Proportional to 398,313.10, 549,665.17 and 217,026.51

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Solution

The fourth proportional to 398,313.10, 549,665.17 and 217,026.51 is: 299,492.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,313.10 : 549,665.17 = 217,026.51 : x
  2. Step 2: Convert to fraction form
    398,313.10/549,665.17 = 217,026.51/x
  3. Step 3: Cross multiply
    398,313.10x = 549,665.17 × 217,026.51
  4. Step 4: Simplify right side
    398,313.10x = 119,291,913,513.66
  5. Step 5: Solve for x
    x = 119,291,913,513.66/398,313.10
  6. Step 6: Final answer
    x = 299,492.82

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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.