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Finding the Fourth Proportional to 438,014.70, 655,709.85 and 260,430.30

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Solution

The fourth proportional to 438,014.70, 655,709.85 and 260,430.30 is: 389,865.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,014.70 : 655,709.85 = 260,430.30 : x
  2. Step 2: Convert to fraction form
    438,014.70/655,709.85 = 260,430.30/x
  3. Step 3: Cross multiply
    438,014.70x = 655,709.85 × 260,430.30
  4. Step 4: Simplify right side
    438,014.70x = 170,766,712,948.46
  5. Step 5: Solve for x
    x = 170,766,712,948.46/438,014.70
  6. Step 6: Final answer
    x = 389,865.26

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1.5x scale

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.