Home / 1,008,021,419.20-1,512,032,128.80-317,998,424.80

Finding the Fourth Proportional to 1,008,021,419.20, 1,512,032,128.80 and 317,998,424.80

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Solution

The fourth proportional to 1,008,021,419.20, 1,512,032,128.80 and 317,998,424.80 is: 476,997,637.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,008,021,419.20 : 1,512,032,128.80 = 317,998,424.80 : x
  2. Step 2: Convert to fraction form
    1,008,021,419.20/1,512,032,128.80 = 317,998,424.80/x
  3. Step 3: Cross multiply
    1,008,021,419.20x = 1,512,032,128.80 × 317,998,424.80
  4. Step 4: Simplify right side
    1,008,021,419.20x = 480,823,835,205,390,720
  5. Step 5: Solve for x
    x = 480,823,835,205,390,720/1,008,021,419.20
  6. Step 6: Final answer
    x = 476,997,637.20

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Double scale
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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.