Home / 718,421.85-991,429.08-396,143.37

Finding the Fourth Proportional to 718,421.85, 991,429.08 and 396,143.37

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Solution

The fourth proportional to 718,421.85, 991,429.08 and 396,143.37 is: 546,681.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,421.85 : 991,429.08 = 396,143.37 : x
  2. Step 2: Convert to fraction form
    718,421.85/991,429.08 = 396,143.37/x
  3. Step 3: Cross multiply
    718,421.85x = 991,429.08 × 396,143.37
  4. Step 4: Simplify right side
    718,421.85x = 392,748,056,867.20
  5. Step 5: Solve for x
    x = 392,748,056,867.20/718,421.85
  6. Step 6: Final answer
    x = 546,681.67

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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.