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Finding the Fourth Proportional to 290,092.80, 435,139.20 and 79,730.40

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Solution

The fourth proportional to 290,092.80, 435,139.20 and 79,730.40 is: 119,595.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,092.80 : 435,139.20 = 79,730.40 : x
  2. Step 2: Convert to fraction form
    290,092.80/435,139.20 = 79,730.40/x
  3. Step 3: Cross multiply
    290,092.80x = 435,139.20 × 79,730.40
  4. Step 4: Simplify right side
    290,092.80x = 34,693,822,471.68
  5. Step 5: Solve for x
    x = 34,693,822,471.68/290,092.80
  6. Step 6: Final answer
    x = 119,595.60

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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.