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Finding the Fourth Proportional to 670,790, 1,005,889.80 and 355,173.20

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Solution

The fourth proportional to 670,790, 1,005,889.80 and 355,173.20 is: 532,603.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,790 : 1,005,889.80 = 355,173.20 : x
  2. Step 2: Convert to fraction form
    670,790/1,005,889.80 = 355,173.20/x
  3. Step 3: Cross multiply
    670,790x = 1,005,889.80 × 355,173.20
  4. Step 4: Simplify right side
    670,790x = 357,265,099,113.36
  5. Step 5: Solve for x
    x = 357,265,099,113.36/670,790
  6. Step 6: Final answer
    x = 532,603.50

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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.