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Finding the Fourth Proportional to 652,235.80, 978,353.70 and 315,437.80

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Solution

The fourth proportional to 652,235.80, 978,353.70 and 315,437.80 is: 473,156.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,235.80 : 978,353.70 = 315,437.80 : x
  2. Step 2: Convert to fraction form
    652,235.80/978,353.70 = 315,437.80/x
  3. Step 3: Cross multiply
    652,235.80x = 978,353.70 × 315,437.80
  4. Step 4: Simplify right side
    652,235.80x = 308,609,738,749.86
  5. Step 5: Solve for x
    x = 308,609,738,749.86/652,235.80
  6. Step 6: Final answer
    x = 473,156.70

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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.