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Finding the Fourth Proportional to 529,678.04, 730,970.12 and 287,976.88

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Solution

The fourth proportional to 529,678.04, 730,970.12 and 287,976.88 is: 397,415.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,678.04 : 730,970.12 = 287,976.88 : x
  2. Step 2: Convert to fraction form
    529,678.04/730,970.12 = 287,976.88/x
  3. Step 3: Cross multiply
    529,678.04x = 730,970.12 × 287,976.88
  4. Step 4: Simplify right side
    529,678.04x = 210,502,494,530.83
  5. Step 5: Solve for x
    x = 210,502,494,530.83/529,678.04
  6. Step 6: Final answer
    x = 397,415.94

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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.