Home / 612,390,013.60-918,585,020.40-440,203,129.60

Finding the Fourth Proportional to 612,390,013.60, 918,585,020.40 and 440,203,129.60

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Solution

The fourth proportional to 612,390,013.60, 918,585,020.40 and 440,203,129.60 is: 660,304,694.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,390,013.60 : 918,585,020.40 = 440,203,129.60 : x
  2. Step 2: Convert to fraction form
    612,390,013.60/918,585,020.40 = 440,203,129.60/x
  3. Step 3: Cross multiply
    612,390,013.60x = 918,585,020.40 × 440,203,129.60
  4. Step 4: Simplify right side
    612,390,013.60x = 404,364,000,783,759,872
  5. Step 5: Solve for x
    x = 404,364,000,783,759,872/612,390,013.60
  6. Step 6: Final answer
    x = 660,304,694.40

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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.