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Finding the Fourth Proportional to 712,551.64, 983,311.44 and 390,261.64

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Solution

The fourth proportional to 712,551.64, 983,311.44 and 390,261.64 is: 538,555.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,551.64 : 983,311.44 = 390,261.64 : x
  2. Step 2: Convert to fraction form
    712,551.64/983,311.44 = 390,261.64/x
  3. Step 3: Cross multiply
    712,551.64x = 983,311.44 × 390,261.64
  4. Step 4: Simplify right side
    712,551.64x = 383,748,735,205.16
  5. Step 5: Solve for x
    x = 383,748,735,205.16/712,551.64
  6. Step 6: Final answer
    x = 538,555.68

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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.