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Finding the Fourth Proportional to 426,048,401.80, 639,072,602.70 and 349,457,912.20

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Solution

The fourth proportional to 426,048,401.80, 639,072,602.70 and 349,457,912.20 is: 524,186,868.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,048,401.80 : 639,072,602.70 = 349,457,912.20 : x
  2. Step 2: Convert to fraction form
    426,048,401.80/639,072,602.70 = 349,457,912.20/x
  3. Step 3: Cross multiply
    426,048,401.80x = 639,072,602.70 × 349,457,912.20
  4. Step 4: Simplify right side
    426,048,401.80x = 223,328,977,483,762,080
  5. Step 5: Solve for x
    x = 223,328,977,483,762,080/426,048,401.80
  6. Step 6: Final answer
    x = 524,186,868.30

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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.