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Finding the Fourth Proportional to 1,149,040, 1,723,590.72 and 390,880

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Solution

The fourth proportional to 1,149,040, 1,723,590.72 and 390,880 is: 586,330.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,149,040 : 1,723,590.72 = 390,880 : x
  2. Step 2: Convert to fraction form
    1,149,040/1,723,590.72 = 390,880/x
  3. Step 3: Cross multiply
    1,149,040x = 1,723,590.72 × 390,880
  4. Step 4: Simplify right side
    1,149,040x = 673,717,140,633.60
  5. Step 5: Solve for x
    x = 673,717,140,633.60/1,149,040
  6. Step 6: Final answer
    x = 586,330.45

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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.