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Finding the Fourth Proportional to 478,605.27, 660,466.78 and 260,815.89

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Solution

The fourth proportional to 478,605.27, 660,466.78 and 260,815.89 is: 359,921.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,605.27 : 660,466.78 = 260,815.89 : x
  2. Step 2: Convert to fraction form
    478,605.27/660,466.78 = 260,815.89/x
  3. Step 3: Cross multiply
    478,605.27x = 660,466.78 × 260,815.89
  4. Step 4: Simplify right side
    478,605.27x = 172,260,231,041.13
  5. Step 5: Solve for x
    x = 172,260,231,041.13/478,605.27
  6. Step 6: Final answer
    x = 359,921.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.