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Finding the Fourth Proportional to 652,407.60, 978,611.40 and 439,831.20

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Solution

The fourth proportional to 652,407.60, 978,611.40 and 439,831.20 is: 659,746.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,407.60 : 978,611.40 = 439,831.20 : x
  2. Step 2: Convert to fraction form
    652,407.60/978,611.40 = 439,831.20/x
  3. Step 3: Cross multiply
    652,407.60x = 978,611.40 × 439,831.20
  4. Step 4: Simplify right side
    652,407.60x = 430,423,826,395.68
  5. Step 5: Solve for x
    x = 430,423,826,395.68/652,407.60
  6. Step 6: Final answer
    x = 659,746.80

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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.