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Finding the Fourth Proportional to 851,660.40, 1,276,907.40 and 402,596.40

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Solution

The fourth proportional to 851,660.40, 1,276,907.40 and 402,596.40 is: 603,618.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    851,660.40 : 1,276,907.40 = 402,596.40 : x
  2. Step 2: Convert to fraction form
    851,660.40/1,276,907.40 = 402,596.40/x
  3. Step 3: Cross multiply
    851,660.40x = 1,276,907.40 × 402,596.40
  4. Step 4: Simplify right side
    851,660.40x = 514,078,322,373.36
  5. Step 5: Solve for x
    x = 514,078,322,373.36/851,660.40
  6. Step 6: Final answer
    x = 603,618.91

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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.