Home / 660,139,856.40-990,847,513.80-401,859,530.40

Finding the Fourth Proportional to 660,139,856.40, 990,847,513.80 and 401,859,530.40

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Solution

The fourth proportional to 660,139,856.40, 990,847,513.80 and 401,859,530.40 is: 603,177,512.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,139,856.40 : 990,847,513.80 = 401,859,530.40 : x
  2. Step 2: Convert to fraction form
    660,139,856.40/990,847,513.80 = 401,859,530.40/x
  3. Step 3: Cross multiply
    660,139,856.40x = 990,847,513.80 × 401,859,530.40
  4. Step 4: Simplify right side
    660,139,856.40x = 398,181,516,593,675,456
  5. Step 5: Solve for x
    x = 398,181,516,593,675,456/660,139,856.40
  6. Step 6: Final answer
    x = 603,177,512.66

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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.