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Finding the Fourth Proportional to 718,483.56, 991,499.99 and 391,795.77

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Solution

The fourth proportional to 718,483.56, 991,499.99 and 391,795.77 is: 540,674.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,483.56 : 991,499.99 = 391,795.77 : x
  2. Step 2: Convert to fraction form
    718,483.56/991,499.99 = 391,795.77/x
  3. Step 3: Cross multiply
    718,483.56x = 991,499.99 × 391,795.77
  4. Step 4: Simplify right side
    718,483.56x = 388,465,502,037.04
  5. Step 5: Solve for x
    x = 388,465,502,037.04/718,483.56
  6. Step 6: Final answer
    x = 540,674.17

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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.