Home / 817,521.69-1,128,171.78-454,939.35

Finding the Fourth Proportional to 817,521.69, 1,128,171.78 and 454,939.35

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Solution

The fourth proportional to 817,521.69, 1,128,171.78 and 454,939.35 is: 627,811.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,521.69 : 1,128,171.78 = 454,939.35 : x
  2. Step 2: Convert to fraction form
    817,521.69/1,128,171.78 = 454,939.35/x
  3. Step 3: Cross multiply
    817,521.69x = 1,128,171.78 × 454,939.35
  4. Step 4: Simplify right side
    817,521.69x = 513,249,732,050.90
  5. Step 5: Solve for x
    x = 513,249,732,050.90/817,521.69
  6. Step 6: Final answer
    x = 627,811.76

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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.