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Finding the Fourth Proportional to 520,222.89, 780,334.71 and 141,143.60

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Solution

The fourth proportional to 520,222.89, 780,334.71 and 141,143.60 is: 211,715.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,222.89 : 780,334.71 = 141,143.60 : x
  2. Step 2: Convert to fraction form
    520,222.89/780,334.71 = 141,143.60/x
  3. Step 3: Cross multiply
    520,222.89x = 780,334.71 × 141,143.60
  4. Step 4: Simplify right side
    520,222.89x = 110,139,248,000.45
  5. Step 5: Solve for x
    x = 110,139,248,000.45/520,222.89
  6. Step 6: Final answer
    x = 211,715.50

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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.