Home / 1,117,728,007.20-1,676,592,010.80-390,640,903.20

Finding the Fourth Proportional to 1,117,728,007.20, 1,676,592,010.80 and 390,640,903.20

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Solution

The fourth proportional to 1,117,728,007.20, 1,676,592,010.80 and 390,640,903.20 is: 585,961,354.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,117,728,007.20 : 1,676,592,010.80 = 390,640,903.20 : x
  2. Step 2: Convert to fraction form
    1,117,728,007.20/1,676,592,010.80 = 390,640,903.20/x
  3. Step 3: Cross multiply
    1,117,728,007.20x = 1,676,592,010.80 × 390,640,903.20
  4. Step 4: Simplify right side
    1,117,728,007.20x = 654,945,417,396,816,128
  5. Step 5: Solve for x
    x = 654,945,417,396,816,128/1,117,728,007.20
  6. Step 6: Final answer
    x = 585,961,354.80

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1.5x scale

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.