Home / 666,942,085.74-920,078,272.96-402,539,559.42

Finding the Fourth Proportional to 666,942,085.74, 920,078,272.96 and 402,539,559.42

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Solution

The fourth proportional to 666,942,085.74, 920,078,272.96 and 402,539,559.42 is: 555,322,434.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,942,085.74 : 920,078,272.96 = 402,539,559.42 : x
  2. Step 2: Convert to fraction form
    666,942,085.74/920,078,272.96 = 402,539,559.42/x
  3. Step 3: Cross multiply
    666,942,085.74x = 920,078,272.96 × 402,539,559.42
  4. Step 4: Simplify right side
    666,942,085.74x = 370,367,902,629,232,960
  5. Step 5: Solve for x
    x = 370,367,902,629,232,960/666,942,085.74
  6. Step 6: Final answer
    x = 555,322,434.36

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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.