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Finding the Fourth Proportional to 978,339.60, 1,467,509.40 and 907,480.80

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Solution

The fourth proportional to 978,339.60, 1,467,509.40 and 907,480.80 is: 1,361,221.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,339.60 : 1,467,509.40 = 907,480.80 : x
  2. Step 2: Convert to fraction form
    978,339.60/1,467,509.40 = 907,480.80/x
  3. Step 3: Cross multiply
    978,339.60x = 1,467,509.40 × 907,480.80
  4. Step 4: Simplify right side
    978,339.60x = 1,331,736,604,319.52
  5. Step 5: Solve for x
    x = 1,331,736,604,319.52/978,339.60
  6. Step 6: Final answer
    x = 1,361,221.20

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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.