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Finding the Fourth Proportional to 851,840.52, 1,277,386.52 and 318,987.80

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Solution

The fourth proportional to 851,840.52, 1,277,386.52 and 318,987.80 is: 478,341.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    851,840.52 : 1,277,386.52 = 318,987.80 : x
  2. Step 2: Convert to fraction form
    851,840.52/1,277,386.52 = 318,987.80/x
  3. Step 3: Cross multiply
    851,840.52x = 1,277,386.52 × 318,987.80
  4. Step 4: Simplify right side
    851,840.52x = 407,470,715,764.46
  5. Step 5: Solve for x
    x = 407,470,715,764.46/851,840.52
  6. Step 6: Final answer
    x = 478,341.55

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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.