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Finding the Fourth Proportional to 660,672.50, 991,156.13 and 211,420.35

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Solution

The fourth proportional to 660,672.50, 991,156.13 and 211,420.35 is: 317,177.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,672.50 : 991,156.13 = 211,420.35 : x
  2. Step 2: Convert to fraction form
    660,672.50/991,156.13 = 211,420.35/x
  3. Step 3: Cross multiply
    660,672.50x = 991,156.13 × 211,420.35
  4. Step 4: Simplify right side
    660,672.50x = 209,550,574,852.14
  5. Step 5: Solve for x
    x = 209,550,574,852.14/660,672.50
  6. Step 6: Final answer
    x = 317,177.69

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1.5x scale

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.