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Finding the Fourth Proportional to 290,332.80, 435,628.80 and 103,478.40

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Solution

The fourth proportional to 290,332.80, 435,628.80 and 103,478.40 is: 155,263.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,332.80 : 435,628.80 = 103,478.40 : x
  2. Step 2: Convert to fraction form
    290,332.80/435,628.80 = 103,478.40/x
  3. Step 3: Cross multiply
    290,332.80x = 435,628.80 × 103,478.40
  4. Step 4: Simplify right side
    290,332.80x = 45,078,171,217.92
  5. Step 5: Solve for x
    x = 45,078,171,217.92/290,332.80
  6. Step 6: Final answer
    x = 155,263.79

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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.