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Finding the Fourth Proportional to 292,208.40, 438,312.60 and 285,647.40

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Solution

The fourth proportional to 292,208.40, 438,312.60 and 285,647.40 is: 428,471.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,208.40 : 438,312.60 = 285,647.40 : x
  2. Step 2: Convert to fraction form
    292,208.40/438,312.60 = 285,647.40/x
  3. Step 3: Cross multiply
    292,208.40x = 438,312.60 × 285,647.40
  4. Step 4: Simplify right side
    292,208.40x = 125,202,854,577.24
  5. Step 5: Solve for x
    x = 125,202,854,577.24/292,208.40
  6. Step 6: Final answer
    x = 428,471.10

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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.