Home / 1,020,641.20-1,530,305.70-421,840.60

Finding the Fourth Proportional to 1,020,641.20, 1,530,305.70 and 421,840.60

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Solution

The fourth proportional to 1,020,641.20, 1,530,305.70 and 421,840.60 is: 632,489.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020,641.20 : 1,530,305.70 = 421,840.60 : x
  2. Step 2: Convert to fraction form
    1,020,641.20/1,530,305.70 = 421,840.60/x
  3. Step 3: Cross multiply
    1,020,641.20x = 1,530,305.70 × 421,840.60
  4. Step 4: Simplify right side
    1,020,641.20x = 645,545,074,671.42
  5. Step 5: Solve for x
    x = 645,545,074,671.42/1,020,641.20
  6. Step 6: Final answer
    x = 632,489.73

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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.