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Finding the Fourth Proportional to 326,430.72, 489,093.12 and 260,075.52

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Solution

The fourth proportional to 326,430.72, 489,093.12 and 260,075.52 is: 389,672.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,430.72 : 489,093.12 = 260,075.52 : x
  2. Step 2: Convert to fraction form
    326,430.72/489,093.12 = 260,075.52/x
  3. Step 3: Cross multiply
    326,430.72x = 489,093.12 × 260,075.52
  4. Step 4: Simplify right side
    326,430.72x = 127,201,147,512.42
  5. Step 5: Solve for x
    x = 127,201,147,512.42/326,430.72
  6. Step 6: Final answer
    x = 389,672.72

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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.