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Finding the Fourth Proportional to 438,621.01, 657,955 and 139,124.32

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Solution

The fourth proportional to 438,621.01, 657,955 and 139,124.32 is: 208,693.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,621.01 : 657,955 = 139,124.32 : x
  2. Step 2: Convert to fraction form
    438,621.01/657,955 = 139,124.32/x
  3. Step 3: Cross multiply
    438,621.01x = 657,955 × 139,124.32
  4. Step 4: Simplify right side
    438,621.01x = 91,537,538,675.83
  5. Step 5: Solve for x
    x = 91,537,538,675.83/438,621.01
  6. Step 6: Final answer
    x = 208,693.92

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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.