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Finding the Fourth Proportional to 429,567.48, 644,430.48 and 141,395.40

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Solution

The fourth proportional to 429,567.48, 644,430.48 and 141,395.40 is: 212,119.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,567.48 : 644,430.48 = 141,395.40 : x
  2. Step 2: Convert to fraction form
    429,567.48/644,430.48 = 141,395.40/x
  3. Step 3: Cross multiply
    429,567.48x = 644,430.48 × 141,395.40
  4. Step 4: Simplify right side
    429,567.48x = 91,119,505,491.79
  5. Step 5: Solve for x
    x = 91,119,505,491.79/429,567.48
  6. Step 6: Final answer
    x = 212,119.19

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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.