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Finding the Fourth Proportional to 669,683.60, 1,004,208.60 and 389,286.80

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Solution

The fourth proportional to 669,683.60, 1,004,208.60 and 389,286.80 is: 583,746.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,683.60 : 1,004,208.60 = 389,286.80 : x
  2. Step 2: Convert to fraction form
    669,683.60/1,004,208.60 = 389,286.80/x
  3. Step 3: Cross multiply
    669,683.60x = 1,004,208.60 × 389,286.80
  4. Step 4: Simplify right side
    669,683.60x = 390,925,152,426.48
  5. Step 5: Solve for x
    x = 390,925,152,426.48/669,683.60
  6. Step 6: Final answer
    x = 583,746.04

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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.