Home / 278,908,537.40-418,362,806.10-261,902,425.40

Finding the Fourth Proportional to 278,908,537.40, 418,362,806.10 and 261,902,425.40

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Solution

The fourth proportional to 278,908,537.40, 418,362,806.10 and 261,902,425.40 is: 392,853,638.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,908,537.40 : 418,362,806.10 = 261,902,425.40 : x
  2. Step 2: Convert to fraction form
    278,908,537.40/418,362,806.10 = 261,902,425.40/x
  3. Step 3: Cross multiply
    278,908,537.40x = 418,362,806.10 × 261,902,425.40
  4. Step 4: Simplify right side
    278,908,537.40x = 109,570,233,614,739,920
  5. Step 5: Solve for x
    x = 109,570,233,614,739,920/278,908,537.40
  6. Step 6: Final answer
    x = 392,853,638.10

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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.