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Finding the Fourth Proportional to 712,517.10, 983,274 and 390,247.53

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Solution

The fourth proportional to 712,517.10, 983,274 and 390,247.53 is: 538,541.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,517.10 : 983,274 = 390,247.53 : x
  2. Step 2: Convert to fraction form
    712,517.10/983,274 = 390,247.53/x
  3. Step 3: Cross multiply
    712,517.10x = 983,274 × 390,247.53
  4. Step 4: Simplify right side
    712,517.10x = 383,720,249,813.22
  5. Step 5: Solve for x
    x = 383,720,249,813.22/712,517.10
  6. Step 6: Final answer
    x = 538,541.81

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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.