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Finding the Fourth Proportional to 529,688.76, 730,984.59 and 287,987.64

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Solution

The fourth proportional to 529,688.76, 730,984.59 and 287,987.64 is: 397,430.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,688.76 : 730,984.59 = 287,987.64 : x
  2. Step 2: Convert to fraction form
    529,688.76/730,984.59 = 287,987.64/x
  3. Step 3: Cross multiply
    529,688.76x = 730,984.59 × 287,987.64
  4. Step 4: Simplify right side
    529,688.76x = 210,514,526,950.47
  5. Step 5: Solve for x
    x = 210,514,526,950.47/529,688.76
  6. Step 6: Final answer
    x = 397,430.61

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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.