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Finding the Fourth Proportional to 429,136.41, 643,816.78 and 249,048.72

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Solution

The fourth proportional to 429,136.41, 643,816.78 and 249,048.72 is: 373,638.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,136.41 : 643,816.78 = 249,048.72 : x
  2. Step 2: Convert to fraction form
    429,136.41/643,816.78 = 249,048.72/x
  3. Step 3: Cross multiply
    429,136.41x = 643,816.78 × 249,048.72
  4. Step 4: Simplify right side
    429,136.41x = 160,341,744,973.52
  5. Step 5: Solve for x
    x = 160,341,744,973.52/429,136.41
  6. Step 6: Final answer
    x = 373,638.17

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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.