Home / 641,387.59-885,208.77-369,402.55

Finding the Fourth Proportional to 641,387.59, 885,208.77 and 369,402.55

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Solution

The fourth proportional to 641,387.59, 885,208.77 and 369,402.55 is: 509,829.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,387.59 : 885,208.77 = 369,402.55 : x
  2. Step 2: Convert to fraction form
    641,387.59/885,208.77 = 369,402.55/x
  3. Step 3: Cross multiply
    641,387.59x = 885,208.77 × 369,402.55
  4. Step 4: Simplify right side
    641,387.59x = 326,998,374,707.34
  5. Step 5: Solve for x
    x = 326,998,374,707.34/641,387.59
  6. Step 6: Final answer
    x = 509,829.60

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Double scale
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1.5x scale

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.