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Finding the Fourth Proportional to 398,477.48, 549,894.08 and 217,188.86

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Solution

The fourth proportional to 398,477.48, 549,894.08 and 217,188.86 is: 299,717.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,477.48 : 549,894.08 = 217,188.86 : x
  2. Step 2: Convert to fraction form
    398,477.48/549,894.08 = 217,188.86/x
  3. Step 3: Cross multiply
    398,477.48x = 549,894.08 × 217,188.86
  4. Step 4: Simplify right side
    398,477.48x = 119,430,865,606.48
  5. Step 5: Solve for x
    x = 119,430,865,606.48/398,477.48
  6. Step 6: Final answer
    x = 299,717.98

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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.