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Finding the Fourth Proportional to 660,695.76, 911,823.96 and 370,356.47

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Solution

The fourth proportional to 660,695.76, 911,823.96 and 370,356.47 is: 511,127.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,695.76 : 911,823.96 = 370,356.47 : x
  2. Step 2: Convert to fraction form
    660,695.76/911,823.96 = 370,356.47/x
  3. Step 3: Cross multiply
    660,695.76x = 911,823.96 × 370,356.47
  4. Step 4: Simplify right side
    660,695.76x = 337,699,898,527.90
  5. Step 5: Solve for x
    x = 337,699,898,527.90/660,695.76
  6. Step 6: Final answer
    x = 511,127.69

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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.