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Finding the Fourth Proportional to 517,139.64, 713,680.20 and 302,405.40

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Solution

The fourth proportional to 517,139.64, 713,680.20 and 302,405.40 is: 417,335.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    517,139.64 : 713,680.20 = 302,405.40 : x
  2. Step 2: Convert to fraction form
    517,139.64/713,680.20 = 302,405.40/x
  3. Step 3: Cross multiply
    517,139.64x = 713,680.20 × 302,405.40
  4. Step 4: Simplify right side
    517,139.64x = 215,820,746,353.08
  5. Step 5: Solve for x
    x = 215,820,746,353.08/517,139.64
  6. Step 6: Final answer
    x = 417,335.53

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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.