Home / 986,985.40-1,480,823.70-426,422.20

Finding the Fourth Proportional to 986,985.40, 1,480,823.70 and 426,422.20

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Solution

The fourth proportional to 986,985.40, 1,480,823.70 and 426,422.20 is: 639,782.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    986,985.40 : 1,480,823.70 = 426,422.20 : x
  2. Step 2: Convert to fraction form
    986,985.40/1,480,823.70 = 426,422.20/x
  3. Step 3: Cross multiply
    986,985.40x = 1,480,823.70 × 426,422.20
  4. Step 4: Simplify right side
    986,985.40x = 631,456,099,966.14
  5. Step 5: Solve for x
    x = 631,456,099,966.14/986,985.40
  6. Step 6: Final answer
    x = 639,782.61

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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.