Home / 385,831.20-578,660.40-253,639.20

Finding the Fourth Proportional to 385,831.20, 578,660.40 and 253,639.20

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Solution

The fourth proportional to 385,831.20, 578,660.40 and 253,639.20 is: 380,402.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,831.20 : 578,660.40 = 253,639.20 : x
  2. Step 2: Convert to fraction form
    385,831.20/578,660.40 = 253,639.20/x
  3. Step 3: Cross multiply
    385,831.20x = 578,660.40 × 253,639.20
  4. Step 4: Simplify right side
    385,831.20x = 146,770,960,927.68
  5. Step 5: Solve for x
    x = 146,770,960,927.68/385,831.20
  6. Step 6: Final answer
    x = 380,402.00

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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.