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Finding the Fourth Proportional to 666,794,643.63, 920,176,608.20 and 373,439,211.63

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Solution

The fourth proportional to 666,794,643.63, 920,176,608.20 and 373,439,211.63 is: 515,346,112.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,794,643.63 : 920,176,608.20 = 373,439,211.63 : x
  2. Step 2: Convert to fraction form
    666,794,643.63/920,176,608.20 = 373,439,211.63/x
  3. Step 3: Cross multiply
    666,794,643.63x = 920,176,608.20 × 373,439,211.63
  4. Step 4: Simplify right side
    666,794,643.63x = 343,630,027,126,575,424
  5. Step 5: Solve for x
    x = 343,630,027,126,575,424/666,794,643.63
  6. Step 6: Final answer
    x = 515,346,112.04

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1.5x scale

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.