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Finding the Fourth Proportional to 319,218.80, 478,828.20 and 207,244.40

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Solution

The fourth proportional to 319,218.80, 478,828.20 and 207,244.40 is: 310,866.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,218.80 : 478,828.20 = 207,244.40 : x
  2. Step 2: Convert to fraction form
    319,218.80/478,828.20 = 207,244.40/x
  3. Step 3: Cross multiply
    319,218.80x = 478,828.20 × 207,244.40
  4. Step 4: Simplify right side
    319,218.80x = 99,234,463,012.08
  5. Step 5: Solve for x
    x = 99,234,463,012.08/319,218.80
  6. Step 6: Final answer
    x = 310,866.60

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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.