Home / 909,720,915.15-1,360,990,967.66-689,027,999.41

Finding the Fourth Proportional to 909,720,915.15, 1,360,990,967.66 and 689,027,999.41

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Solution

The fourth proportional to 909,720,915.15, 1,360,990,967.66 and 689,027,999.41 is: 1,030,822,605.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    909,720,915.15 : 1,360,990,967.66 = 689,027,999.41 : x
  2. Step 2: Convert to fraction form
    909,720,915.15/1,360,990,967.66 = 689,027,999.41/x
  3. Step 3: Cross multiply
    909,720,915.15x = 1,360,990,967.66 × 689,027,999.41
  4. Step 4: Simplify right side
    909,720,915.15x = 937,760,883,661,849,856
  5. Step 5: Solve for x
    x = 937,760,883,661,849,856/909,720,915.15
  6. Step 6: Final answer
    x = 1,030,822,605.09

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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.