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Finding the Fourth Proportional to 661,556.61, 912,807.34 and 389,525.25

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Solution

The fourth proportional to 661,556.61, 912,807.34 and 389,525.25 is: 537,461.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,556.61 : 912,807.34 = 389,525.25 : x
  2. Step 2: Convert to fraction form
    661,556.61/912,807.34 = 389,525.25/x
  3. Step 3: Cross multiply
    661,556.61x = 912,807.34 × 389,525.25
  4. Step 4: Simplify right side
    661,556.61x = 355,561,505,367.71
  5. Step 5: Solve for x
    x = 355,561,505,367.71/661,556.61
  6. Step 6: Final answer
    x = 537,461.95

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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.