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Finding the Fourth Proportional to 712,308.24, 982,954.92 and 390,012.48

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Solution

The fourth proportional to 712,308.24, 982,954.92 and 390,012.48 is: 538,200.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,308.24 : 982,954.92 = 390,012.48 : x
  2. Step 2: Convert to fraction form
    712,308.24/982,954.92 = 390,012.48/x
  3. Step 3: Cross multiply
    712,308.24x = 982,954.92 × 390,012.48
  4. Step 4: Simplify right side
    712,308.24x = 383,364,686,077.40
  5. Step 5: Solve for x
    x = 383,364,686,077.40/712,308.24
  6. Step 6: Final answer
    x = 538,200.55

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1.5x scale

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.