Home / 660,719.40-991,079.12-286,742.40

Finding the Fourth Proportional to 660,719.40, 991,079.12 and 286,742.40

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Solution

The fourth proportional to 660,719.40, 991,079.12 and 286,742.40 is: 430,113.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,719.40 : 991,079.12 = 286,742.40 : x
  2. Step 2: Convert to fraction form
    660,719.40/991,079.12 = 286,742.40/x
  3. Step 3: Cross multiply
    660,719.40x = 991,079.12 × 286,742.40
  4. Step 4: Simplify right side
    660,719.40x = 284,184,405,458.69
  5. Step 5: Solve for x
    x = 284,184,405,458.69/660,719.40
  6. Step 6: Final answer
    x = 430,113.61

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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.