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Finding the Fourth Proportional to 487,287.30, 730,821.60 and 319,981.80

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Solution

The fourth proportional to 487,287.30, 730,821.60 and 319,981.80 is: 479,900.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,287.30 : 730,821.60 = 319,981.80 : x
  2. Step 2: Convert to fraction form
    487,287.30/730,821.60 = 319,981.80/x
  3. Step 3: Cross multiply
    487,287.30x = 730,821.60 × 319,981.80
  4. Step 4: Simplify right side
    487,287.30x = 233,849,611,046.88
  5. Step 5: Solve for x
    x = 233,849,611,046.88/487,287.30
  6. Step 6: Final answer
    x = 479,900.89

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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.