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Finding the Fourth Proportional to 871,315,040.40, 1,220,748,049.20 and 871,315,040.40

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Solution

The fourth proportional to 871,315,040.40, 1,220,748,049.20 and 871,315,040.40 is: 1,220,748,049.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,315,040.40 : 1,220,748,049.20 = 871,315,040.40 : x
  2. Step 2: Convert to fraction form
    871,315,040.40/1,220,748,049.20 = 871,315,040.40/x
  3. Step 3: Cross multiply
    871,315,040.40x = 1,220,748,049.20 × 871,315,040.40
  4. Step 4: Simplify right side
    871,315,040.40x = 1,063,656,135,806,919,168
  5. Step 5: Solve for x
    x = 1,063,656,135,806,919,168/871,315,040.40
  6. Step 6: Final answer
    x = 1,220,748,049.20

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.