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Finding the Fourth Proportional to 398,784.94, 550,303.80 and 237,636.40

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Solution

The fourth proportional to 398,784.94, 550,303.80 and 237,636.40 is: 327,926.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,784.94 : 550,303.80 = 237,636.40 : x
  2. Step 2: Convert to fraction form
    398,784.94/550,303.80 = 237,636.40/x
  3. Step 3: Cross multiply
    398,784.94x = 550,303.80 × 237,636.40
  4. Step 4: Simplify right side
    398,784.94x = 130,772,213,938.32
  5. Step 5: Solve for x
    x = 130,772,213,938.32/398,784.94
  6. Step 6: Final answer
    x = 327,926.66

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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.