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Finding the Fourth Proportional to 489,672.80, 734,509.20 and 472,565.60

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Solution

The fourth proportional to 489,672.80, 734,509.20 and 472,565.60 is: 708,848.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,672.80 : 734,509.20 = 472,565.60 : x
  2. Step 2: Convert to fraction form
    489,672.80/734,509.20 = 472,565.60/x
  3. Step 3: Cross multiply
    489,672.80x = 734,509.20 × 472,565.60
  4. Step 4: Simplify right side
    489,672.80x = 347,103,780,803.52
  5. Step 5: Solve for x
    x = 347,103,780,803.52/489,672.80
  6. Step 6: Final answer
    x = 708,848.40

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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.