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Finding the Fourth Proportional to 209,920.70, 314,881.05 and 207,952.40

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Solution

The fourth proportional to 209,920.70, 314,881.05 and 207,952.40 is: 311,928.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,920.70 : 314,881.05 = 207,952.40 : x
  2. Step 2: Convert to fraction form
    209,920.70/314,881.05 = 207,952.40/x
  3. Step 3: Cross multiply
    209,920.70x = 314,881.05 × 207,952.40
  4. Step 4: Simplify right side
    209,920.70x = 65,480,270,062.02
  5. Step 5: Solve for x
    x = 65,480,270,062.02/209,920.70
  6. Step 6: Final answer
    x = 311,928.60

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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.