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Finding the Fourth Proportional to 303,345.95, 455,018.93 and 103,636.40

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Solution

The fourth proportional to 303,345.95, 455,018.93 and 103,636.40 is: 155,454.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,345.95 : 455,018.93 = 103,636.40 : x
  2. Step 2: Convert to fraction form
    303,345.95/455,018.93 = 103,636.40/x
  3. Step 3: Cross multiply
    303,345.95x = 455,018.93 × 103,636.40
  4. Step 4: Simplify right side
    303,345.95x = 47,156,523,837.05
  5. Step 5: Solve for x
    x = 47,156,523,837.05/303,345.95
  6. Step 6: Final answer
    x = 155,454.60

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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.