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Finding the Fourth Proportional to 978,596,440.53, 1,350,747,658.54 and 639,555,919.07

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Solution

The fourth proportional to 978,596,440.53, 1,350,747,658.54 and 639,555,919.07 is: 882,773,147.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,596,440.53 : 1,350,747,658.54 = 639,555,919.07 : x
  2. Step 2: Convert to fraction form
    978,596,440.53/1,350,747,658.54 = 639,555,919.07/x
  3. Step 3: Cross multiply
    978,596,440.53x = 1,350,747,658.54 × 639,555,919.07
  4. Step 4: Simplify right side
    978,596,440.53x = 863,878,660,179,248,896
  5. Step 5: Solve for x
    x = 863,878,660,179,248,896/978,596,440.53
  6. Step 6: Final answer
    x = 882,773,147.75

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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.