Home / 858,831.40-1,288,247.10-438,052.60

Finding the Fourth Proportional to 858,831.40, 1,288,247.10 and 438,052.60

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Solution

The fourth proportional to 858,831.40, 1,288,247.10 and 438,052.60 is: 657,078.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,831.40 : 1,288,247.10 = 438,052.60 : x
  2. Step 2: Convert to fraction form
    858,831.40/1,288,247.10 = 438,052.60/x
  3. Step 3: Cross multiply
    858,831.40x = 1,288,247.10 × 438,052.60
  4. Step 4: Simplify right side
    858,831.40x = 564,319,991,597.46
  5. Step 5: Solve for x
    x = 564,319,991,597.46/858,831.40
  6. Step 6: Final answer
    x = 657,078.90

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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.