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Finding the Fourth Proportional to 696,684, 961,435.08 and 390,828.60

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Solution

The fourth proportional to 696,684, 961,435.08 and 390,828.60 is: 539,349.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    696,684 : 961,435.08 = 390,828.60 : x
  2. Step 2: Convert to fraction form
    696,684/961,435.08 = 390,828.60/x
  3. Step 3: Cross multiply
    696,684x = 961,435.08 × 390,828.60
  4. Step 4: Simplify right side
    696,684x = 375,756,326,307.29
  5. Step 5: Solve for x
    x = 375,756,326,307.29/696,684
  6. Step 6: Final answer
    x = 539,349.73

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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.