Home / 778,520,920.64-1,074,355,003.69-421,288,445.57

Finding the Fourth Proportional to 778,520,920.64, 1,074,355,003.69 and 421,288,445.57

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Solution

The fourth proportional to 778,520,920.64, 1,074,355,003.69 and 421,288,445.57 is: 581,375,962.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,520,920.64 : 1,074,355,003.69 = 421,288,445.57 : x
  2. Step 2: Convert to fraction form
    778,520,920.64/1,074,355,003.69 = 421,288,445.57/x
  3. Step 3: Cross multiply
    778,520,920.64x = 1,074,355,003.69 × 421,288,445.57
  4. Step 4: Simplify right side
    778,520,920.64x = 452,613,349,494,535,360
  5. Step 5: Solve for x
    x = 452,613,349,494,535,360/778,520,920.64
  6. Step 6: Final answer
    x = 581,375,962.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.