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Finding the Fourth Proportional to 660,671.62, 991,155.10 and 211,419.48

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Solution

The fourth proportional to 660,671.62, 991,155.10 and 211,419.48 is: 317,176.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,671.62 : 991,155.10 = 211,419.48 : x
  2. Step 2: Convert to fraction form
    660,671.62/991,155.10 = 211,419.48/x
  3. Step 3: Cross multiply
    660,671.62x = 991,155.10 × 211,419.48
  4. Step 4: Simplify right side
    660,671.62x = 209,549,495,841.35
  5. Step 5: Solve for x
    x = 209,549,495,841.35/660,671.62
  6. Step 6: Final answer
    x = 317,176.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.