Home / 785,415.60-1,178,123.40-727,678.80

Finding the Fourth Proportional to 785,415.60, 1,178,123.40 and 727,678.80

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Solution

The fourth proportional to 785,415.60, 1,178,123.40 and 727,678.80 is: 1,091,518.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    785,415.60 : 1,178,123.40 = 727,678.80 : x
  2. Step 2: Convert to fraction form
    785,415.60/1,178,123.40 = 727,678.80/x
  3. Step 3: Cross multiply
    785,415.60x = 1,178,123.40 × 727,678.80
  4. Step 4: Simplify right side
    785,415.60x = 857,295,421,963.92
  5. Step 5: Solve for x
    x = 857,295,421,963.92/785,415.60
  6. Step 6: Final answer
    x = 1,091,518.20

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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.