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Finding the Fourth Proportional to 712,419.49, 983,161.16 and 390,160.18

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Solution

The fourth proportional to 712,419.49, 983,161.16 and 390,160.18 is: 538,433.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,419.49 : 983,161.16 = 390,160.18 : x
  2. Step 2: Convert to fraction form
    712,419.49/983,161.16 = 390,160.18/x
  3. Step 3: Cross multiply
    712,419.49x = 983,161.16 × 390,160.18
  4. Step 4: Simplify right side
    712,419.49x = 383,590,335,154.61
  5. Step 5: Solve for x
    x = 383,590,335,154.61/712,419.49
  6. Step 6: Final answer
    x = 538,433.24

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.