Home / 663,623.66-915,774.28-391,779.12

Finding the Fourth Proportional to 663,623.66, 915,774.28 and 391,779.12

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Solution

The fourth proportional to 663,623.66, 915,774.28 and 391,779.12 is: 540,639.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,623.66 : 915,774.28 = 391,779.12 : x
  2. Step 2: Convert to fraction form
    663,623.66/915,774.28 = 391,779.12/x
  3. Step 3: Cross multiply
    663,623.66x = 915,774.28 × 391,779.12
  4. Step 4: Simplify right side
    663,623.66x = 358,781,241,537.03
  5. Step 5: Solve for x
    x = 358,781,241,537.03/663,623.66
  6. Step 6: Final answer
    x = 540,639.62

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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.