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Finding the Fourth Proportional to 213,426.40, 320,139.60 and 199,602.40

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Solution

The fourth proportional to 213,426.40, 320,139.60 and 199,602.40 is: 299,403.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,426.40 : 320,139.60 = 199,602.40 : x
  2. Step 2: Convert to fraction form
    213,426.40/320,139.60 = 199,602.40/x
  3. Step 3: Cross multiply
    213,426.40x = 320,139.60 × 199,602.40
  4. Step 4: Simplify right side
    213,426.40x = 63,900,632,495.04
  5. Step 5: Solve for x
    x = 63,900,632,495.04/213,426.40
  6. Step 6: Final answer
    x = 299,403.60

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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.