Home / 390,724.32-539,283.30-254,515.23

Finding the Fourth Proportional to 390,724.32, 539,283.30 and 254,515.23

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Solution

The fourth proportional to 390,724.32, 539,283.30 and 254,515.23 is: 351,285.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,724.32 : 539,283.30 = 254,515.23 : x
  2. Step 2: Convert to fraction form
    390,724.32/539,283.30 = 254,515.23/x
  3. Step 3: Cross multiply
    390,724.32x = 539,283.30 × 254,515.23
  4. Step 4: Simplify right side
    390,724.32x = 137,255,810,438.24
  5. Step 5: Solve for x
    x = 137,255,810,438.24/390,724.32
  6. Step 6: Final answer
    x = 351,285.56

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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.