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Finding the Fourth Proportional to 661,308.80, 912,542.16 and 370,931.84

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Solution

The fourth proportional to 661,308.80, 912,542.16 and 370,931.84 is: 511,850.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,308.80 : 912,542.16 = 370,931.84 : x
  2. Step 2: Convert to fraction form
    661,308.80/912,542.16 = 370,931.84/x
  3. Step 3: Cross multiply
    661,308.80x = 912,542.16 × 370,931.84
  4. Step 4: Simplify right side
    661,308.80x = 338,490,942,486.37
  5. Step 5: Solve for x
    x = 338,490,942,486.37/661,308.80
  6. Step 6: Final answer
    x = 511,850.05

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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.