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Finding the Fourth Proportional to 978,596,440.03, 1,350,747,657.84 and 639,555,918.56

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Solution

The fourth proportional to 978,596,440.03, 1,350,747,657.84 and 639,555,918.56 is: 882,773,147.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,596,440.03 : 1,350,747,657.84 = 639,555,918.56 : x
  2. Step 2: Convert to fraction form
    978,596,440.03/1,350,747,657.84 = 639,555,918.56/x
  3. Step 3: Cross multiply
    978,596,440.03x = 1,350,747,657.84 × 639,555,918.56
  4. Step 4: Simplify right side
    978,596,440.03x = 863,878,659,061,003,392
  5. Step 5: Solve for x
    x = 863,878,659,061,003,392/978,596,440.03
  6. Step 6: Final answer
    x = 882,773,147.05

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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.