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Finding the Fourth Proportional to 712,659.93, 983,435.76 and 390,371.46

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Solution

The fourth proportional to 712,659.93, 983,435.76 and 390,371.46 is: 538,693.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,659.93 : 983,435.76 = 390,371.46 : x
  2. Step 2: Convert to fraction form
    712,659.93/983,435.76 = 390,371.46/x
  3. Step 3: Cross multiply
    712,659.93x = 983,435.76 × 390,371.46
  4. Step 4: Simplify right side
    712,659.93x = 383,905,253,447.41
  5. Step 5: Solve for x
    x = 383,905,253,447.41/712,659.93
  6. Step 6: Final answer
    x = 538,693.47

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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.