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Finding the Fourth Proportional to 652,628.20, 978,423.90 and 357,140.20

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Solution

The fourth proportional to 652,628.20, 978,423.90 and 357,140.20 is: 535,426.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,628.20 : 978,423.90 = 357,140.20 : x
  2. Step 2: Convert to fraction form
    652,628.20/978,423.90 = 357,140.20/x
  3. Step 3: Cross multiply
    652,628.20x = 978,423.90 × 357,140.20
  4. Step 4: Simplify right side
    652,628.20x = 349,434,507,330.78
  5. Step 5: Solve for x
    x = 349,434,507,330.78/652,628.20
  6. Step 6: Final answer
    x = 535,426.61

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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.