Home / 457,811.40-686,717.10-142,300.20

Finding the Fourth Proportional to 457,811.40, 686,717.10 and 142,300.20

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Solution

The fourth proportional to 457,811.40, 686,717.10 and 142,300.20 is: 213,450.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,811.40 : 686,717.10 = 142,300.20 : x
  2. Step 2: Convert to fraction form
    457,811.40/686,717.10 = 142,300.20/x
  3. Step 3: Cross multiply
    457,811.40x = 686,717.10 × 142,300.20
  4. Step 4: Simplify right side
    457,811.40x = 97,719,980,673.42
  5. Step 5: Solve for x
    x = 97,719,980,673.42/457,811.40
  6. Step 6: Final answer
    x = 213,450.30

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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.