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Finding the Fourth Proportional to 670,402.71, 925,136.25 and 380,041.20

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Solution

The fourth proportional to 670,402.71, 925,136.25 and 380,041.20 is: 524,445.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,402.71 : 925,136.25 = 380,041.20 : x
  2. Step 2: Convert to fraction form
    670,402.71/925,136.25 = 380,041.20/x
  3. Step 3: Cross multiply
    670,402.71x = 925,136.25 × 380,041.20
  4. Step 4: Simplify right side
    670,402.71x = 351,589,889,188.35
  5. Step 5: Solve for x
    x = 351,589,889,188.35/670,402.71
  6. Step 6: Final answer
    x = 524,445.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.