Home / 708,288.74-977,339.85-398,147.47

Finding the Fourth Proportional to 708,288.74, 977,339.85 and 398,147.47

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Solution

The fourth proportional to 708,288.74, 977,339.85 and 398,147.47 is: 549,388.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,288.74 : 977,339.85 = 398,147.47 : x
  2. Step 2: Convert to fraction form
    708,288.74/977,339.85 = 398,147.47/x
  3. Step 3: Cross multiply
    708,288.74x = 977,339.85 × 398,147.47
  4. Step 4: Simplify right side
    708,288.74x = 389,125,388,607.68
  5. Step 5: Solve for x
    x = 389,125,388,607.68/708,288.74
  6. Step 6: Final answer
    x = 549,388.08

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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.