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Finding the Fourth Proportional to 504,639.60, 696,418.20 and 289,822.74

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Solution

The fourth proportional to 504,639.60, 696,418.20 and 289,822.74 is: 399,964.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    504,639.60 : 696,418.20 = 289,822.74 : x
  2. Step 2: Convert to fraction form
    504,639.60/696,418.20 = 289,822.74/x
  3. Step 3: Cross multiply
    504,639.60x = 696,418.20 × 289,822.74
  4. Step 4: Simplify right side
    504,639.60x = 201,837,830,909.87
  5. Step 5: Solve for x
    x = 201,837,830,909.87/504,639.60
  6. Step 6: Final answer
    x = 399,964.31

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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.