Home / 1,119,947,661.32-1,680,002,205.12-429,854,915.36

Finding the Fourth Proportional to 1,119,947,661.32, 1,680,002,205.12 and 429,854,915.36

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Solution

The fourth proportional to 1,119,947,661.32, 1,680,002,205.12 and 429,854,915.36 is: 644,813,352.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,119,947,661.32 : 1,680,002,205.12 = 429,854,915.36 : x
  2. Step 2: Convert to fraction form
    1,119,947,661.32/1,680,002,205.12 = 429,854,915.36/x
  3. Step 3: Cross multiply
    1,119,947,661.32x = 1,680,002,205.12 × 429,854,915.36
  4. Step 4: Simplify right side
    1,119,947,661.32x = 722,157,205,686,470,912
  5. Step 5: Solve for x
    x = 722,157,205,686,470,912/1,119,947,661.32
  6. Step 6: Final answer
    x = 644,813,352.11

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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.