Home / 1,117,728,009.20-1,676,592,013.80-390,640,905.20

Finding the Fourth Proportional to 1,117,728,009.20, 1,676,592,013.80 and 390,640,905.20

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Solution

The fourth proportional to 1,117,728,009.20, 1,676,592,013.80 and 390,640,905.20 is: 585,961,357.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,117,728,009.20 : 1,676,592,013.80 = 390,640,905.20 : x
  2. Step 2: Convert to fraction form
    1,117,728,009.20/1,676,592,013.80 = 390,640,905.20/x
  3. Step 3: Cross multiply
    1,117,728,009.20x = 1,676,592,013.80 × 390,640,905.20
  4. Step 4: Simplify right side
    1,117,728,009.20x = 654,945,421,921,922,816
  5. Step 5: Solve for x
    x = 654,945,421,921,922,816/1,117,728,009.20
  6. Step 6: Final answer
    x = 585,961,357.80

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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.