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Finding the Fourth Proportional to 438,117.16, 604,323.30 and 287,223.88

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Solution

The fourth proportional to 438,117.16, 604,323.30 and 287,223.88 is: 396,186.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,117.16 : 604,323.30 = 287,223.88 : x
  2. Step 2: Convert to fraction form
    438,117.16/604,323.30 = 287,223.88/x
  3. Step 3: Cross multiply
    438,117.16x = 604,323.30 × 287,223.88
  4. Step 4: Simplify right side
    438,117.16x = 173,576,083,000.40
  5. Step 5: Solve for x
    x = 173,576,083,000.40/438,117.16
  6. Step 6: Final answer
    x = 396,186.45

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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.