Home / 1,242,215,999.70-1,862,615,411.55-465,886,986.90

Finding the Fourth Proportional to 1,242,215,999.70, 1,862,615,411.55 and 465,886,986.90

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Solution

The fourth proportional to 1,242,215,999.70, 1,862,615,411.55 and 465,886,986.90 is: 698,564,727.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242,215,999.70 : 1,862,615,411.55 = 465,886,986.90 : x
  2. Step 2: Convert to fraction form
    1,242,215,999.70/1,862,615,411.55 = 465,886,986.90/x
  3. Step 3: Cross multiply
    1,242,215,999.70x = 1,862,615,411.55 × 465,886,986.90
  4. Step 4: Simplify right side
    1,242,215,999.70x = 867,768,281,840,532,864
  5. Step 5: Solve for x
    x = 867,768,281,840,532,864/1,242,215,999.70
  6. Step 6: Final answer
    x = 698,564,727.91

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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.