Home / 306,631.95-459,783.90-128,938.20

Finding the Fourth Proportional to 306,631.95, 459,783.90 and 128,938.20

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Solution

The fourth proportional to 306,631.95, 459,783.90 and 128,938.20 is: 193,338.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,631.95 : 459,783.90 = 128,938.20 : x
  2. Step 2: Convert to fraction form
    306,631.95/459,783.90 = 128,938.20/x
  3. Step 3: Cross multiply
    306,631.95x = 459,783.90 × 128,938.20
  4. Step 4: Simplify right side
    306,631.95x = 59,283,708,454.98
  5. Step 5: Solve for x
    x = 59,283,708,454.98/306,631.95
  6. Step 6: Final answer
    x = 193,338.33

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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.