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Finding the Fourth Proportional to 303,565.60, 455,348.40 and 145,712.80

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Solution

The fourth proportional to 303,565.60, 455,348.40 and 145,712.80 is: 218,569.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,565.60 : 455,348.40 = 145,712.80 : x
  2. Step 2: Convert to fraction form
    303,565.60/455,348.40 = 145,712.80/x
  3. Step 3: Cross multiply
    303,565.60x = 455,348.40 × 145,712.80
  4. Step 4: Simplify right side
    303,565.60x = 66,350,090,339.52
  5. Step 5: Solve for x
    x = 66,350,090,339.52/303,565.60
  6. Step 6: Final answer
    x = 218,569.20

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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.