Home / 457,865.80-686,312.70-221,054.20

Finding the Fourth Proportional to 457,865.80, 686,312.70 and 221,054.20

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Solution

The fourth proportional to 457,865.80, 686,312.70 and 221,054.20 is: 331,346.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,865.80 : 686,312.70 = 221,054.20 : x
  2. Step 2: Convert to fraction form
    457,865.80/686,312.70 = 221,054.20/x
  3. Step 3: Cross multiply
    457,865.80x = 686,312.70 × 221,054.20
  4. Step 4: Simplify right side
    457,865.80x = 151,712,304,848.34
  5. Step 5: Solve for x
    x = 151,712,304,848.34/457,865.80
  6. Step 6: Final answer
    x = 331,346.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.