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Finding the Fourth Proportional to 480,721.32, 663,478.66 and 289,734.93

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Solution

The fourth proportional to 480,721.32, 663,478.66 and 289,734.93 is: 399,884.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,721.32 : 663,478.66 = 289,734.93 : x
  2. Step 2: Convert to fraction form
    480,721.32/663,478.66 = 289,734.93/x
  3. Step 3: Cross multiply
    480,721.32x = 663,478.66 × 289,734.93
  4. Step 4: Simplify right side
    480,721.32x = 192,232,939,069.86
  5. Step 5: Solve for x
    x = 192,232,939,069.86/480,721.32
  6. Step 6: Final answer
    x = 399,884.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.