Home / 399,987,070.50-551,978,090.55-221,371,307.35

Finding the Fourth Proportional to 399,987,070.50, 551,978,090.55 and 221,371,307.35

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Solution

The fourth proportional to 399,987,070.50, 551,978,090.55 and 221,371,307.35 is: 305,490,153.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,987,070.50 : 551,978,090.55 = 221,371,307.35 : x
  2. Step 2: Convert to fraction form
    399,987,070.50/551,978,090.55 = 221,371,307.35/x
  3. Step 3: Cross multiply
    399,987,070.50x = 551,978,090.55 × 221,371,307.35
  4. Step 4: Simplify right side
    399,987,070.50x = 122,192,111,532,230,224
  5. Step 5: Solve for x
    x = 122,192,111,532,230,224/399,987,070.50
  6. Step 6: Final answer
    x = 305,490,153.42

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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.