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Finding the Fourth Proportional to 661,070.16, 991,596.60 and 162,438.48

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Solution

The fourth proportional to 661,070.16, 991,596.60 and 162,438.48 is: 243,655.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,070.16 : 991,596.60 = 162,438.48 : x
  2. Step 2: Convert to fraction form
    661,070.16/991,596.60 = 162,438.48/x
  3. Step 3: Cross multiply
    661,070.16x = 991,596.60 × 162,438.48
  4. Step 4: Simplify right side
    661,070.16x = 161,073,444,477.17
  5. Step 5: Solve for x
    x = 161,073,444,477.17/661,070.16
  6. Step 6: Final answer
    x = 243,655.60

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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.