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Finding the Fourth Proportional to 398,477.73, 549,894.44 and 217,189.10

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Solution

The fourth proportional to 398,477.73, 549,894.44 and 217,189.10 is: 299,718.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,477.73 : 549,894.44 = 217,189.10 : x
  2. Step 2: Convert to fraction form
    398,477.73/549,894.44 = 217,189.10/x
  3. Step 3: Cross multiply
    398,477.73x = 549,894.44 × 217,189.10
  4. Step 4: Simplify right side
    398,477.73x = 119,431,074,683.19
  5. Step 5: Solve for x
    x = 119,431,074,683.19/398,477.73
  6. Step 6: Final answer
    x = 299,718.32

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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.