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Finding the Fourth Proportional to 554,652.90, 765,405.47 and 312,957.96

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Solution

The fourth proportional to 554,652.90, 765,405.47 and 312,957.96 is: 431,873.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,652.90 : 765,405.47 = 312,957.96 : x
  2. Step 2: Convert to fraction form
    554,652.90/765,405.47 = 312,957.96/x
  3. Step 3: Cross multiply
    554,652.90x = 765,405.47 × 312,957.96
  4. Step 4: Simplify right side
    554,652.90x = 239,539,730,985.74
  5. Step 5: Solve for x
    x = 239,539,730,985.74/554,652.90
  6. Step 6: Final answer
    x = 431,873.22

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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.