Home / 660,307,805.60-990,556,186.80-200,281,978.40

Finding the Fourth Proportional to 660,307,805.60, 990,556,186.80 and 200,281,978.40

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Solution

The fourth proportional to 660,307,805.60, 990,556,186.80 and 200,281,978.40 is: 300,451,624.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,307,805.60 : 990,556,186.80 = 200,281,978.40 : x
  2. Step 2: Convert to fraction form
    660,307,805.60/990,556,186.80 = 200,281,978.40/x
  3. Step 3: Cross multiply
    660,307,805.60x = 990,556,186.80 × 200,281,978.40
  4. Step 4: Simplify right side
    660,307,805.60x = 198,390,552,808,663,968
  5. Step 5: Solve for x
    x = 198,390,552,808,663,968/660,307,805.60
  6. Step 6: Final answer
    x = 300,451,624.42

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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.