Home / 870,991,999.20-1,306,487,998.80-386,317,807.20

Finding the Fourth Proportional to 870,991,999.20, 1,306,487,998.80 and 386,317,807.20

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Solution

The fourth proportional to 870,991,999.20, 1,306,487,998.80 and 386,317,807.20 is: 579,476,710.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,991,999.20 : 1,306,487,998.80 = 386,317,807.20 : x
  2. Step 2: Convert to fraction form
    870,991,999.20/1,306,487,998.80 = 386,317,807.20/x
  3. Step 3: Cross multiply
    870,991,999.20x = 1,306,487,998.80 × 386,317,807.20
  4. Step 4: Simplify right side
    870,991,999.20x = 504,719,578,829,532,224
  5. Step 5: Solve for x
    x = 504,719,578,829,532,224/870,991,999.20
  6. Step 6: Final answer
    x = 579,476,710.80

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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.