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Finding the Fourth Proportional to 319,244.20, 478,866.30 and 292,287.40

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Solution

The fourth proportional to 319,244.20, 478,866.30 and 292,287.40 is: 438,431.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,244.20 : 478,866.30 = 292,287.40 : x
  2. Step 2: Convert to fraction form
    319,244.20/478,866.30 = 292,287.40/x
  3. Step 3: Cross multiply
    319,244.20x = 478,866.30 × 292,287.40
  4. Step 4: Simplify right side
    319,244.20x = 139,966,585,774.62
  5. Step 5: Solve for x
    x = 139,966,585,774.62/319,244.20
  6. Step 6: Final answer
    x = 438,431.10

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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.