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Finding the Fourth Proportional to 696,564.55, 961,191.93 and 390,653.47

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Solution

The fourth proportional to 696,564.55, 961,191.93 and 390,653.47 is: 539,064.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    696,564.55 : 961,191.93 = 390,653.47 : x
  2. Step 2: Convert to fraction form
    696,564.55/961,191.93 = 390,653.47/x
  3. Step 3: Cross multiply
    696,564.55x = 961,191.93 × 390,653.47
  4. Step 4: Simplify right side
    696,564.55x = 375,492,962,790.50
  5. Step 5: Solve for x
    x = 375,492,962,790.50/696,564.55
  6. Step 6: Final answer
    x = 539,064.13

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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.