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Finding the Fourth Proportional to 398,391.32, 549,775.02 and 217,111.16

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Solution

The fourth proportional to 398,391.32, 549,775.02 and 217,111.16 is: 299,610.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,391.32 : 549,775.02 = 217,111.16 : x
  2. Step 2: Convert to fraction form
    398,391.32/549,775.02 = 217,111.16/x
  3. Step 3: Cross multiply
    398,391.32x = 549,775.02 × 217,111.16
  4. Step 4: Simplify right side
    398,391.32x = 119,362,292,331.22
  5. Step 5: Solve for x
    x = 119,362,292,331.22/398,391.32
  6. Step 6: Final answer
    x = 299,610.68

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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.