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Finding the Fourth Proportional to 691,862.60, 954,768.72 and 390,054.44

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Solution

The fourth proportional to 691,862.60, 954,768.72 and 390,054.44 is: 538,274.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,862.60 : 954,768.72 = 390,054.44 : x
  2. Step 2: Convert to fraction form
    691,862.60/954,768.72 = 390,054.44/x
  3. Step 3: Cross multiply
    691,862.60x = 954,768.72 × 390,054.44
  4. Step 4: Simplify right side
    691,862.60x = 372,411,778,409.12
  5. Step 5: Solve for x
    x = 372,411,778,409.12/691,862.60
  6. Step 6: Final answer
    x = 538,274.19

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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.