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Finding the Fourth Proportional to 644,993.32, 890,068.08 and 354,602.78

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Solution

The fourth proportional to 644,993.32, 890,068.08 and 354,602.78 is: 489,339.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,993.32 : 890,068.08 = 354,602.78 : x
  2. Step 2: Convert to fraction form
    644,993.32/890,068.08 = 354,602.78/x
  3. Step 3: Cross multiply
    644,993.32x = 890,068.08 × 354,602.78
  4. Step 4: Simplify right side
    644,993.32x = 315,620,615,557.26
  5. Step 5: Solve for x
    x = 315,620,615,557.26/644,993.32
  6. Step 6: Final answer
    x = 489,339.36

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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.