Home / 821,663.20-1,233,416.40-489,426.40

Finding the Fourth Proportional to 821,663.20, 1,233,416.40 and 489,426.40

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Solution

The fourth proportional to 821,663.20, 1,233,416.40 and 489,426.40 is: 734,688.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,663.20 : 1,233,416.40 = 489,426.40 : x
  2. Step 2: Convert to fraction form
    821,663.20/1,233,416.40 = 489,426.40/x
  3. Step 3: Cross multiply
    821,663.20x = 1,233,416.40 × 489,426.40
  4. Step 4: Simplify right side
    821,663.20x = 603,666,548,352.96
  5. Step 5: Solve for x
    x = 603,666,548,352.96/821,663.20
  6. Step 6: Final answer
    x = 734,688.55

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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.