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Finding the Fourth Proportional to 680,444.34, 939,012.12 and 422,225.26

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Solution

The fourth proportional to 680,444.34, 939,012.12 and 422,225.26 is: 582,670.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,444.34 : 939,012.12 = 422,225.26 : x
  2. Step 2: Convert to fraction form
    680,444.34/939,012.12 = 422,225.26/x
  3. Step 3: Cross multiply
    680,444.34x = 939,012.12 × 422,225.26
  4. Step 4: Simplify right side
    680,444.34x = 396,474,636,510.15
  5. Step 5: Solve for x
    x = 396,474,636,510.15/680,444.34
  6. Step 6: Final answer
    x = 582,670.20

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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.