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Finding the Fourth Proportional to 652,305.80, 978,458.70 and 315,507.80

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Solution

The fourth proportional to 652,305.80, 978,458.70 and 315,507.80 is: 473,261.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,305.80 : 978,458.70 = 315,507.80 : x
  2. Step 2: Convert to fraction form
    652,305.80/978,458.70 = 315,507.80/x
  3. Step 3: Cross multiply
    652,305.80x = 978,458.70 × 315,507.80
  4. Step 4: Simplify right side
    652,305.80x = 308,711,351,827.86
  5. Step 5: Solve for x
    x = 308,711,351,827.86/652,305.80
  6. Step 6: Final answer
    x = 473,261.70

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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.