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Finding the Fourth Proportional to 670,939.20, 925,894.80 and 384,458.40

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Solution

The fourth proportional to 670,939.20, 925,894.80 and 384,458.40 is: 530,551.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,939.20 : 925,894.80 = 384,458.40 : x
  2. Step 2: Convert to fraction form
    670,939.20/925,894.80 = 384,458.40/x
  3. Step 3: Cross multiply
    670,939.20x = 925,894.80 × 384,458.40
  4. Step 4: Simplify right side
    670,939.20x = 355,968,033,376.32
  5. Step 5: Solve for x
    x = 355,968,033,376.32/670,939.20
  6. Step 6: Final answer
    x = 530,551.85

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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.