Home / 708,310.23-977,502.77-398,310.38

Finding the Fourth Proportional to 708,310.23, 977,502.77 and 398,310.38

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Solution

The fourth proportional to 708,310.23, 977,502.77 and 398,310.38 is: 549,687.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,310.23 : 977,502.77 = 398,310.38 : x
  2. Step 2: Convert to fraction form
    708,310.23/977,502.77 = 398,310.38/x
  3. Step 3: Cross multiply
    708,310.23x = 977,502.77 × 398,310.38
  4. Step 4: Simplify right side
    708,310.23x = 389,349,492,890.69
  5. Step 5: Solve for x
    x = 389,349,492,890.69/708,310.23
  6. Step 6: Final answer
    x = 549,687.80

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Double scale
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Similar ratio
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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.