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Finding the Fourth Proportional to 303,419.80, 455,129.70 and 93,030.40

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Solution

The fourth proportional to 303,419.80, 455,129.70 and 93,030.40 is: 139,545.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,419.80 : 455,129.70 = 93,030.40 : x
  2. Step 2: Convert to fraction form
    303,419.80/455,129.70 = 93,030.40/x
  3. Step 3: Cross multiply
    303,419.80x = 455,129.70 × 93,030.40
  4. Step 4: Simplify right side
    303,419.80x = 42,340,898,042.88
  5. Step 5: Solve for x
    x = 42,340,898,042.88/303,419.80
  6. Step 6: Final answer
    x = 139,545.60

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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.