Home / 420,385.55-630,827.33-393,787.31

Finding the Fourth Proportional to 420,385.55, 630,827.33 and 393,787.31

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Solution

The fourth proportional to 420,385.55, 630,827.33 and 393,787.31 is: 590,914.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,385.55 : 630,827.33 = 393,787.31 : x
  2. Step 2: Convert to fraction form
    420,385.55/630,827.33 = 393,787.31/x
  3. Step 3: Cross multiply
    420,385.55x = 630,827.33 × 393,787.31
  4. Step 4: Simplify right side
    420,385.55x = 248,411,792,232.11
  5. Step 5: Solve for x
    x = 248,411,792,232.11/420,385.55
  6. Step 6: Final answer
    x = 590,914.21

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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.