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Finding the Fourth Proportional to 626,761,315.02, 864,019,030.23 and 438,003,570.90

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Solution

The fourth proportional to 626,761,315.02, 864,019,030.23 and 438,003,570.90 is: 603,807,879.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,761,315.02 : 864,019,030.23 = 438,003,570.90 : x
  2. Step 2: Convert to fraction form
    626,761,315.02/864,019,030.23 = 438,003,570.90/x
  3. Step 3: Cross multiply
    626,761,315.02x = 864,019,030.23 × 438,003,570.90
  4. Step 4: Simplify right side
    626,761,315.02x = 378,443,420,566,295,040
  5. Step 5: Solve for x
    x = 378,443,420,566,295,040/626,761,315.02
  6. Step 6: Final answer
    x = 603,807,879.49

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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.