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Finding the Fourth Proportional to 457,814.40, 686,656.80 and 142,303.20

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Solution

The fourth proportional to 457,814.40, 686,656.80 and 142,303.20 is: 213,434.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,814.40 : 686,656.80 = 142,303.20 : x
  2. Step 2: Convert to fraction form
    457,814.40/686,656.80 = 142,303.20/x
  3. Step 3: Cross multiply
    457,814.40x = 686,656.80 × 142,303.20
  4. Step 4: Simplify right side
    457,814.40x = 97,713,459,941.76
  5. Step 5: Solve for x
    x = 97,713,459,941.76/457,814.40
  6. Step 6: Final answer
    x = 213,434.66

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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.