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Finding the Fourth Proportional to 713,051.08, 983,967.78 and 390,697

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Solution

The fourth proportional to 713,051.08, 983,967.78 and 390,697 is: 539,138.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,051.08 : 983,967.78 = 390,697 : x
  2. Step 2: Convert to fraction form
    713,051.08/983,967.78 = 390,697/x
  3. Step 3: Cross multiply
    713,051.08x = 983,967.78 × 390,697
  4. Step 4: Simplify right side
    713,051.08x = 384,433,259,742.66
  5. Step 5: Solve for x
    x = 384,433,259,742.66/713,051.08
  6. Step 6: Final answer
    x = 539,138.46

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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.