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Finding the Fourth Proportional to 290,440.80, 435,461.40 and 148,010.40

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Solution

The fourth proportional to 290,440.80, 435,461.40 and 148,010.40 is: 221,913.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,440.80 : 435,461.40 = 148,010.40 : x
  2. Step 2: Convert to fraction form
    290,440.80/435,461.40 = 148,010.40/x
  3. Step 3: Cross multiply
    290,440.80x = 435,461.40 × 148,010.40
  4. Step 4: Simplify right side
    290,440.80x = 64,452,815,998.56
  5. Step 5: Solve for x
    x = 64,452,815,998.56/290,440.80
  6. Step 6: Final answer
    x = 221,913.78

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1.5x scale

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.