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Finding the Fourth Proportional to 688,185, 949,695.30 and 386,385.48

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Solution

The fourth proportional to 688,185, 949,695.30 and 386,385.48 is: 533,211.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,185 : 949,695.30 = 386,385.48 : x
  2. Step 2: Convert to fraction form
    688,185/949,695.30 = 386,385.48/x
  3. Step 3: Cross multiply
    688,185x = 949,695.30 × 386,385.48
  4. Step 4: Simplify right side
    688,185x = 366,948,474,344.24
  5. Step 5: Solve for x
    x = 366,948,474,344.24/688,185
  6. Step 6: Final answer
    x = 533,211.96

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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.