Home / 680,374.11-938,916.04-393,888.04

Finding the Fourth Proportional to 680,374.11, 938,916.04 and 393,888.04

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Solution

The fourth proportional to 680,374.11, 938,916.04 and 393,888.04 is: 543,565.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,374.11 : 938,916.04 = 393,888.04 : x
  2. Step 2: Convert to fraction form
    680,374.11/938,916.04 = 393,888.04/x
  3. Step 3: Cross multiply
    680,374.11x = 938,916.04 × 393,888.04
  4. Step 4: Simplify right side
    680,374.11x = 369,827,798,720.16
  5. Step 5: Solve for x
    x = 369,827,798,720.16/680,374.11
  6. Step 6: Final answer
    x = 543,565.36

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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.