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Finding the Fourth Proportional to 680,718.90, 939,376.53 and 426,210.42

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Solution

The fourth proportional to 680,718.90, 939,376.53 and 426,210.42 is: 588,160.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,718.90 : 939,376.53 = 426,210.42 : x
  2. Step 2: Convert to fraction form
    680,718.90/939,376.53 = 426,210.42/x
  3. Step 3: Cross multiply
    680,718.90x = 939,376.53 × 426,210.42
  4. Step 4: Simplify right side
    680,718.90x = 400,372,065,389.44
  5. Step 5: Solve for x
    x = 400,372,065,389.44/680,718.90
  6. Step 6: Final answer
    x = 588,160.64

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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.