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Finding the Fourth Proportional to 521,211.41, 718,900.95 and 478,329.38

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Solution

The fourth proportional to 521,211.41, 718,900.95 and 478,329.38 is: 659,754.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,211.41 : 718,900.95 = 478,329.38 : x
  2. Step 2: Convert to fraction form
    521,211.41/718,900.95 = 478,329.38/x
  3. Step 3: Cross multiply
    521,211.41x = 718,900.95 × 478,329.38
  4. Step 4: Simplify right side
    521,211.41x = 343,871,442,550.16
  5. Step 5: Solve for x
    x = 343,871,442,550.16/521,211.41
  6. Step 6: Final answer
    x = 659,754.25

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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.