Home / 457,534.90-686,630.40-257,643.10

Finding the Fourth Proportional to 457,534.90, 686,630.40 and 257,643.10

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Solution

The fourth proportional to 457,534.90, 686,630.40 and 257,643.10 is: 386,649.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,534.90 : 686,630.40 = 257,643.10 : x
  2. Step 2: Convert to fraction form
    457,534.90/686,630.40 = 257,643.10/x
  3. Step 3: Cross multiply
    457,534.90x = 686,630.40 × 257,643.10
  4. Step 4: Simplify right side
    457,534.90x = 176,905,584,810.24
  5. Step 5: Solve for x
    x = 176,905,584,810.24/457,534.90
  6. Step 6: Final answer
    x = 386,649.38

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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.