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Finding the Fourth Proportional to 675,416.58, 931,873.86 and 388,929.30

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Solution

The fourth proportional to 675,416.58, 931,873.86 and 388,929.30 is: 536,606.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    675,416.58 : 931,873.86 = 388,929.30 : x
  2. Step 2: Convert to fraction form
    675,416.58/931,873.86 = 388,929.30/x
  3. Step 3: Cross multiply
    675,416.58x = 931,873.86 × 388,929.30
  4. Step 4: Simplify right side
    675,416.58x = 362,433,048,058.10
  5. Step 5: Solve for x
    x = 362,433,048,058.10/675,416.58
  6. Step 6: Final answer
    x = 536,606.68

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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.