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Finding the Fourth Proportional to 626,428.32, 864,471.02 and 339,948.40

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Solution

The fourth proportional to 626,428.32, 864,471.02 and 339,948.40 is: 469,128.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,428.32 : 864,471.02 = 339,948.40 : x
  2. Step 2: Convert to fraction form
    626,428.32/864,471.02 = 339,948.40/x
  3. Step 3: Cross multiply
    626,428.32x = 864,471.02 × 339,948.40
  4. Step 4: Simplify right side
    626,428.32x = 293,875,540,095.37
  5. Step 5: Solve for x
    x = 293,875,540,095.37/626,428.32
  6. Step 6: Final answer
    x = 469,128.76

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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.