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Finding the Fourth Proportional to 520,117.95, 780,326.37 and 216,453

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Solution

The fourth proportional to 520,117.95, 780,326.37 and 216,453 is: 324,741.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,117.95 : 780,326.37 = 216,453 : x
  2. Step 2: Convert to fraction form
    520,117.95/780,326.37 = 216,453/x
  3. Step 3: Cross multiply
    520,117.95x = 780,326.37 × 216,453
  4. Step 4: Simplify right side
    520,117.95x = 168,903,983,765.61
  5. Step 5: Solve for x
    x = 168,903,983,765.61/520,117.95
  6. Step 6: Final answer
    x = 324,741.69

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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.