Home / 521,931.08-720,220.92-289,364.24

Finding the Fourth Proportional to 521,931.08, 720,220.92 and 289,364.24

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Solution

The fourth proportional to 521,931.08, 720,220.92 and 289,364.24 is: 399,298.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,931.08 : 720,220.92 = 289,364.24 : x
  2. Step 2: Convert to fraction form
    521,931.08/720,220.92 = 289,364.24/x
  3. Step 3: Cross multiply
    521,931.08x = 720,220.92 × 289,364.24
  4. Step 4: Simplify right side
    521,931.08x = 208,406,179,147.90
  5. Step 5: Solve for x
    x = 208,406,179,147.90/521,931.08
  6. Step 6: Final answer
    x = 399,298.27

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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.