Home / 817,763.60-1,128,488.65-455,178.15

Finding the Fourth Proportional to 817,763.60, 1,128,488.65 and 455,178.15

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Solution

The fourth proportional to 817,763.60, 1,128,488.65 and 455,178.15 is: 628,131.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,763.60 : 1,128,488.65 = 455,178.15 : x
  2. Step 2: Convert to fraction form
    817,763.60/1,128,488.65 = 455,178.15/x
  3. Step 3: Cross multiply
    817,763.60x = 1,128,488.65 × 455,178.15
  4. Step 4: Simplify right side
    817,763.60x = 513,663,374,865.05
  5. Step 5: Solve for x
    x = 513,663,374,865.05/817,763.60
  6. Step 6: Final answer
    x = 628,131.86

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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.