Home / 1,247,932,912.40-1,871,395,483.80-429,623,997.20

Finding the Fourth Proportional to 1,247,932,912.40, 1,871,395,483.80 and 429,623,997.20

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Solution

The fourth proportional to 1,247,932,912.40, 1,871,395,483.80 and 429,623,997.20 is: 644,262,524.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247,932,912.40 : 1,871,395,483.80 = 429,623,997.20 : x
  2. Step 2: Convert to fraction form
    1,247,932,912.40/1,871,395,483.80 = 429,623,997.20/x
  3. Step 3: Cross multiply
    1,247,932,912.40x = 1,871,395,483.80 × 429,623,997.20
  4. Step 4: Simplify right side
    1,247,932,912.40x = 803,996,408,092,183,808
  5. Step 5: Solve for x
    x = 803,996,408,092,183,808/1,247,932,912.40
  6. Step 6: Final answer
    x = 644,262,524.13

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.