Home / 708,491.18-977,668.96-398,440.10

Finding the Fourth Proportional to 708,491.18, 977,668.96 and 398,440.10

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Solution

The fourth proportional to 708,491.18, 977,668.96 and 398,440.10 is: 549,819.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,491.18 : 977,668.96 = 398,440.10 : x
  2. Step 2: Convert to fraction form
    708,491.18/977,668.96 = 398,440.10/x
  3. Step 3: Cross multiply
    708,491.18x = 977,668.96 × 398,440.10
  4. Step 4: Simplify right side
    708,491.18x = 389,542,518,189.30
  5. Step 5: Solve for x
    x = 389,542,518,189.30/708,491.18
  6. Step 6: Final answer
    x = 549,819.86

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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.