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Finding the Fourth Proportional to 398,316.11, 549,669.29 and 217,029.54

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Solution

The fourth proportional to 398,316.11, 549,669.29 and 217,029.54 is: 299,496.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,316.11 : 549,669.29 = 217,029.54 : x
  2. Step 2: Convert to fraction form
    398,316.11/549,669.29 = 217,029.54/x
  3. Step 3: Cross multiply
    398,316.11x = 549,669.29 × 217,029.54
  4. Step 4: Simplify right side
    398,316.11x = 119,294,472,075.68
  5. Step 5: Solve for x
    x = 119,294,472,075.68/398,316.11
  6. Step 6: Final answer
    x = 299,496.98

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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.