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Finding the Fourth Proportional to 875,575.80, 1,312,391.70 and 342,919.80

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Solution

The fourth proportional to 875,575.80, 1,312,391.70 and 342,919.80 is: 513,999.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    875,575.80 : 1,312,391.70 = 342,919.80 : x
  2. Step 2: Convert to fraction form
    875,575.80/1,312,391.70 = 342,919.80/x
  3. Step 3: Cross multiply
    875,575.80x = 1,312,391.70 × 342,919.80
  4. Step 4: Simplify right side
    875,575.80x = 450,045,099,285.66
  5. Step 5: Solve for x
    x = 450,045,099,285.66/875,575.80
  6. Step 6: Final answer
    x = 513,999.02

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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.