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Finding the Fourth Proportional to 520,353.79, 780,582.63 and 141,280.62

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Solution

The fourth proportional to 520,353.79, 780,582.63 and 141,280.62 is: 211,935.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,353.79 : 780,582.63 = 141,280.62 : x
  2. Step 2: Convert to fraction form
    520,353.79/780,582.63 = 141,280.62/x
  3. Step 3: Cross multiply
    520,353.79x = 780,582.63 × 141,280.62
  4. Step 4: Simplify right side
    520,353.79x = 110,281,197,927.63
  5. Step 5: Solve for x
    x = 110,281,197,927.63/520,353.79
  6. Step 6: Final answer
    x = 211,935.04

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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.