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Finding the Fourth Proportional to 359,272.60, 538,908.90 and 318,837.40

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Solution

The fourth proportional to 359,272.60, 538,908.90 and 318,837.40 is: 478,256.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    359,272.60 : 538,908.90 = 318,837.40 : x
  2. Step 2: Convert to fraction form
    359,272.60/538,908.90 = 318,837.40/x
  3. Step 3: Cross multiply
    359,272.60x = 538,908.90 × 318,837.40
  4. Step 4: Simplify right side
    359,272.60x = 171,824,312,512.86
  5. Step 5: Solve for x
    x = 171,824,312,512.86/359,272.60
  6. Step 6: Final answer
    x = 478,256.10

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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.