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Finding the Fourth Proportional to 579,740.40, 869,999.40 and 342,831.60

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Solution

The fourth proportional to 579,740.40, 869,999.40 and 342,831.60 is: 514,477.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,740.40 : 869,999.40 = 342,831.60 : x
  2. Step 2: Convert to fraction form
    579,740.40/869,999.40 = 342,831.60/x
  3. Step 3: Cross multiply
    579,740.40x = 869,999.40 × 342,831.60
  4. Step 4: Simplify right side
    579,740.40x = 298,263,286,301.04
  5. Step 5: Solve for x
    x = 298,263,286,301.04/579,740.40
  6. Step 6: Final answer
    x = 514,477.32

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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.