Home / 720,153.63-1,079,528.37-287,742.18

Finding the Fourth Proportional to 720,153.63, 1,079,528.37 and 287,742.18

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Solution

The fourth proportional to 720,153.63, 1,079,528.37 and 287,742.18 is: 431,332.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,153.63 : 1,079,528.37 = 287,742.18 : x
  2. Step 2: Convert to fraction form
    720,153.63/1,079,528.37 = 287,742.18/x
  3. Step 3: Cross multiply
    720,153.63x = 1,079,528.37 × 287,742.18
  4. Step 4: Simplify right side
    720,153.63x = 310,625,846,555.65
  5. Step 5: Solve for x
    x = 310,625,846,555.65/720,153.63
  6. Step 6: Final answer
    x = 431,332.75

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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.