Home / 521,945.32-720,631.38-400,870.21

Finding the Fourth Proportional to 521,945.32, 720,631.38 and 400,870.21

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Solution

The fourth proportional to 521,945.32, 720,631.38 and 400,870.21 is: 553,467.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,945.32 : 720,631.38 = 400,870.21 : x
  2. Step 2: Convert to fraction form
    521,945.32/720,631.38 = 400,870.21/x
  3. Step 3: Cross multiply
    521,945.32x = 720,631.38 × 400,870.21
  4. Step 4: Simplify right side
    521,945.32x = 288,879,652,633.19
  5. Step 5: Solve for x
    x = 288,879,652,633.19/521,945.32
  6. Step 6: Final answer
    x = 553,467.27

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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.