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Finding the Fourth Proportional to 485,678.25, 670,235.99 and 284,474.25

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Solution

The fourth proportional to 485,678.25, 670,235.99 and 284,474.25 is: 392,574.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,678.25 : 670,235.99 = 284,474.25 : x
  2. Step 2: Convert to fraction form
    485,678.25/670,235.99 = 284,474.25/x
  3. Step 3: Cross multiply
    485,678.25x = 670,235.99 × 284,474.25
  4. Step 4: Simplify right side
    485,678.25x = 190,664,879,155.89
  5. Step 5: Solve for x
    x = 190,664,879,155.89/485,678.25
  6. Step 6: Final answer
    x = 392,574.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.