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Finding the Fourth Proportional to 403,495.80, 604,368.90 and 261,778.20

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Solution

The fourth proportional to 403,495.80, 604,368.90 and 261,778.20 is: 392,099.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,495.80 : 604,368.90 = 261,778.20 : x
  2. Step 2: Convert to fraction form
    403,495.80/604,368.90 = 261,778.20/x
  3. Step 3: Cross multiply
    403,495.80x = 604,368.90 × 261,778.20
  4. Step 4: Simplify right side
    403,495.80x = 158,210,602,777.98
  5. Step 5: Solve for x
    x = 158,210,602,777.98/403,495.80
  6. Step 6: Final answer
    x = 392,099.75

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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.