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Finding the Fourth Proportional to 398,404.10, 549,783.70 and 217,112.32

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Solution

The fourth proportional to 398,404.10, 549,783.70 and 217,112.32 is: 299,607.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,404.10 : 549,783.70 = 217,112.32 : x
  2. Step 2: Convert to fraction form
    398,404.10/549,783.70 = 217,112.32/x
  3. Step 3: Cross multiply
    398,404.10x = 549,783.70 × 217,112.32
  4. Step 4: Simplify right side
    398,404.10x = 119,364,814,605.18
  5. Step 5: Solve for x
    x = 119,364,814,605.18/398,404.10
  6. Step 6: Final answer
    x = 299,607.40

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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.