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Finding the Fourth Proportional to 492,572.80, 738,686.40 and 255,836.80

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Solution

The fourth proportional to 492,572.80, 738,686.40 and 255,836.80 is: 383,665.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,572.80 : 738,686.40 = 255,836.80 : x
  2. Step 2: Convert to fraction form
    492,572.80/738,686.40 = 255,836.80/x
  3. Step 3: Cross multiply
    492,572.80x = 738,686.40 × 255,836.80
  4. Step 4: Simplify right side
    492,572.80x = 188,983,164,779.52
  5. Step 5: Solve for x
    x = 188,983,164,779.52/492,572.80
  6. Step 6: Final answer
    x = 383,665.45

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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.