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Finding the Fourth Proportional to 303,348.95, 455,023.43 and 103,639.40

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Solution

The fourth proportional to 303,348.95, 455,023.43 and 103,639.40 is: 155,459.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,348.95 : 455,023.43 = 103,639.40 : x
  2. Step 2: Convert to fraction form
    303,348.95/455,023.43 = 103,639.40/x
  3. Step 3: Cross multiply
    303,348.95x = 455,023.43 × 103,639.40
  4. Step 4: Simplify right side
    303,348.95x = 47,158,355,271.14
  5. Step 5: Solve for x
    x = 47,158,355,271.14/303,348.95
  6. Step 6: Final answer
    x = 155,459.10

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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.