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Finding the Fourth Proportional to 639,345,657.68, 882,293,763.84 and 345,990,225.68

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Solution

The fourth proportional to 639,345,657.68, 882,293,763.84 and 345,990,225.68 is: 477,464,756.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,345,657.68 : 882,293,763.84 = 345,990,225.68 : x
  2. Step 2: Convert to fraction form
    639,345,657.68/882,293,763.84 = 345,990,225.68/x
  3. Step 3: Cross multiply
    639,345,657.68x = 882,293,763.84 × 345,990,225.68
  4. Step 4: Simplify right side
    639,345,657.68x = 305,265,018,467,058,240
  5. Step 5: Solve for x
    x = 305,265,018,467,058,240/639,345,657.68
  6. Step 6: Final answer
    x = 477,464,756.04

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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.