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Finding the Fourth Proportional to 492,348.32, 678,782.61 and 369,317.71

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Solution

The fourth proportional to 492,348.32, 678,782.61 and 369,317.71 is: 509,164.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,348.32 : 678,782.61 = 369,317.71 : x
  2. Step 2: Convert to fraction form
    492,348.32/678,782.61 = 369,317.71/x
  3. Step 3: Cross multiply
    492,348.32x = 678,782.61 × 369,317.71
  4. Step 4: Simplify right side
    492,348.32x = 250,686,437,416.07
  5. Step 5: Solve for x
    x = 250,686,437,416.07/492,348.32
  6. Step 6: Final answer
    x = 509,164.81

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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.