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Finding the Fourth Proportional to 670,415.90, 1,005,672.45 and 403,601.90

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Solution

The fourth proportional to 670,415.90, 1,005,672.45 and 403,601.90 is: 605,432.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,415.90 : 1,005,672.45 = 403,601.90 : x
  2. Step 2: Convert to fraction form
    670,415.90/1,005,672.45 = 403,601.90/x
  3. Step 3: Cross multiply
    670,415.90x = 1,005,672.45 × 403,601.90
  4. Step 4: Simplify right side
    670,415.90x = 405,891,311,597.66
  5. Step 5: Solve for x
    x = 405,891,311,597.66/670,415.90
  6. Step 6: Final answer
    x = 605,432.11

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1.5x scale

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.