Home / 438,051.30-657,336.15-319,424.10

Finding the Fourth Proportional to 438,051.30, 657,336.15 and 319,424.10

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Solution

The fourth proportional to 438,051.30, 657,336.15 and 319,424.10 is: 479,325.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,051.30 : 657,336.15 = 319,424.10 : x
  2. Step 2: Convert to fraction form
    438,051.30/657,336.15 = 319,424.10/x
  3. Step 3: Cross multiply
    438,051.30x = 657,336.15 × 319,424.10
  4. Step 4: Simplify right side
    438,051.30x = 209,969,008,111.22
  5. Step 5: Solve for x
    x = 209,969,008,111.22/438,051.30
  6. Step 6: Final answer
    x = 479,325.16

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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.