Home / 721,435.32-1,082,151.95-289,347.71

Finding the Fourth Proportional to 721,435.32, 1,082,151.95 and 289,347.71

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Solution

The fourth proportional to 721,435.32, 1,082,151.95 and 289,347.71 is: 434,021.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,435.32 : 1,082,151.95 = 289,347.71 : x
  2. Step 2: Convert to fraction form
    721,435.32/1,082,151.95 = 289,347.71/x
  3. Step 3: Cross multiply
    721,435.32x = 1,082,151.95 × 289,347.71
  4. Step 4: Simplify right side
    721,435.32x = 313,118,181,747.04
  5. Step 5: Solve for x
    x = 313,118,181,747.04/721,435.32
  6. Step 6: Final answer
    x = 434,021.14

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Double scale
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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.