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Finding the Fourth Proportional to 478,599.98, 660,352.64 and 315,239.31

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Solution

The fourth proportional to 478,599.98, 660,352.64 and 315,239.31 is: 434,954.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,599.98 : 660,352.64 = 315,239.31 : x
  2. Step 2: Convert to fraction form
    478,599.98/660,352.64 = 315,239.31/x
  3. Step 3: Cross multiply
    478,599.98x = 660,352.64 × 315,239.31
  4. Step 4: Simplify right side
    478,599.98x = 208,169,109,014.08
  5. Step 5: Solve for x
    x = 208,169,109,014.08/478,599.98
  6. Step 6: Final answer
    x = 434,954.28

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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.