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Finding the Fourth Proportional to 891,663.90, 1,230,496.07 and 509,698.86

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Solution

The fourth proportional to 891,663.90, 1,230,496.07 and 509,698.86 is: 703,384.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    891,663.90 : 1,230,496.07 = 509,698.86 : x
  2. Step 2: Convert to fraction form
    891,663.90/1,230,496.07 = 509,698.86/x
  3. Step 3: Cross multiply
    891,663.90x = 1,230,496.07 × 509,698.86
  4. Step 4: Simplify right side
    891,663.90x = 627,182,444,113.48
  5. Step 5: Solve for x
    x = 627,182,444,113.48/891,663.90
  6. Step 6: Final answer
    x = 703,384.36

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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.