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Finding the Fourth Proportional to 660,852, 912,053.52 and 392,580

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Solution

The fourth proportional to 660,852, 912,053.52 and 392,580 is: 541,806.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,852 : 912,053.52 = 392,580 : x
  2. Step 2: Convert to fraction form
    660,852/912,053.52 = 392,580/x
  3. Step 3: Cross multiply
    660,852x = 912,053.52 × 392,580
  4. Step 4: Simplify right side
    660,852x = 358,053,970,881.60
  5. Step 5: Solve for x
    x = 358,053,970,881.60/660,852
  6. Step 6: Final answer
    x = 541,806.59

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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.