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Finding the Fourth Proportional to 651,929.80, 978,186.30 and 314,840.20

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Solution

The fourth proportional to 651,929.80, 978,186.30 and 314,840.20 is: 472,401.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,929.80 : 978,186.30 = 314,840.20 : x
  2. Step 2: Convert to fraction form
    651,929.80/978,186.30 = 314,840.20/x
  3. Step 3: Cross multiply
    651,929.80x = 978,186.30 × 314,840.20
  4. Step 4: Simplify right side
    651,929.80x = 307,972,370,329.26
  5. Step 5: Solve for x
    x = 307,972,370,329.26/651,929.80
  6. Step 6: Final answer
    x = 472,401.12

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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.