Home / 939,475.78-1,409,389.23-427,178.55

Finding the Fourth Proportional to 939,475.78, 1,409,389.23 and 427,178.55

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Solution

The fourth proportional to 939,475.78, 1,409,389.23 and 427,178.55 is: 640,847.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    939,475.78 : 1,409,389.23 = 427,178.55 : x
  2. Step 2: Convert to fraction form
    939,475.78/1,409,389.23 = 427,178.55/x
  3. Step 3: Cross multiply
    939,475.78x = 1,409,389.23 × 427,178.55
  4. Step 4: Simplify right side
    939,475.78x = 602,060,847,657.02
  5. Step 5: Solve for x
    x = 602,060,847,657.02/939,475.78
  6. Step 6: Final answer
    x = 640,847.65

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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.