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Finding the Fourth Proportional to 712,604.48, 983,394.60 and 390,314.48

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Solution

The fourth proportional to 712,604.48, 983,394.60 and 390,314.48 is: 538,634.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,604.48 : 983,394.60 = 390,314.48 : x
  2. Step 2: Convert to fraction form
    712,604.48/983,394.60 = 390,314.48/x
  3. Step 3: Cross multiply
    712,604.48x = 983,394.60 × 390,314.48
  4. Step 4: Simplify right side
    712,604.48x = 383,833,151,933.81
  5. Step 5: Solve for x
    x = 383,833,151,933.81/712,604.48
  6. Step 6: Final answer
    x = 538,634.21

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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.