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Finding the Fourth Proportional to 427,362.72, 640,692.72 and 249,430.56

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Solution

The fourth proportional to 427,362.72, 640,692.72 and 249,430.56 is: 373,940.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,362.72 : 640,692.72 = 249,430.56 : x
  2. Step 2: Convert to fraction form
    427,362.72/640,692.72 = 249,430.56/x
  3. Step 3: Cross multiply
    427,362.72x = 640,692.72 × 249,430.56
  4. Step 4: Simplify right side
    427,362.72x = 159,808,343,937.52
  5. Step 5: Solve for x
    x = 159,808,343,937.52/427,362.72
  6. Step 6: Final answer
    x = 373,940.77

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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.