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Finding the Fourth Proportional to 551,970.40, 761,710.08 and 306,945.40

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Solution

The fourth proportional to 551,970.40, 761,710.08 and 306,945.40 is: 423,579.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,970.40 : 761,710.08 = 306,945.40 : x
  2. Step 2: Convert to fraction form
    551,970.40/761,710.08 = 306,945.40/x
  3. Step 3: Cross multiply
    551,970.40x = 761,710.08 × 306,945.40
  4. Step 4: Simplify right side
    551,970.40x = 233,803,405,189.63
  5. Step 5: Solve for x
    x = 233,803,405,189.63/551,970.40
  6. Step 6: Final answer
    x = 423,579.61

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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.