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Finding the Fourth Proportional to 644,280.24, 889,147.88 and 357,800.40

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Solution

The fourth proportional to 644,280.24, 889,147.88 and 357,800.40 is: 493,787.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,280.24 : 889,147.88 = 357,800.40 : x
  2. Step 2: Convert to fraction form
    644,280.24/889,147.88 = 357,800.40/x
  3. Step 3: Cross multiply
    644,280.24x = 889,147.88 × 357,800.40
  4. Step 4: Simplify right side
    644,280.24x = 318,137,467,123.15
  5. Step 5: Solve for x
    x = 318,137,467,123.15/644,280.24
  6. Step 6: Final answer
    x = 493,787.40

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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.