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Finding the Fourth Proportional to 310,339.40, 428,324.10 and 183,007.40

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Solution

The fourth proportional to 310,339.40, 428,324.10 and 183,007.40 is: 252,583.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,339.40 : 428,324.10 = 183,007.40 : x
  2. Step 2: Convert to fraction form
    310,339.40/428,324.10 = 183,007.40/x
  3. Step 3: Cross multiply
    310,339.40x = 428,324.10 × 183,007.40
  4. Step 4: Simplify right side
    310,339.40x = 78,386,479,898.34
  5. Step 5: Solve for x
    x = 78,386,479,898.34/310,339.40
  6. Step 6: Final answer
    x = 252,583.07

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1.5x scale

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.