Home / 380,648,009.40-525,294,252.99-215,635,578.90

Finding the Fourth Proportional to 380,648,009.40, 525,294,252.99 and 215,635,578.90

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Solution

The fourth proportional to 380,648,009.40, 525,294,252.99 and 215,635,578.90 is: 297,577,098.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,648,009.40 : 525,294,252.99 = 215,635,578.90 : x
  2. Step 2: Convert to fraction form
    380,648,009.40/525,294,252.99 = 215,635,578.90/x
  3. Step 3: Cross multiply
    380,648,009.40x = 525,294,252.99 × 215,635,578.90
  4. Step 4: Simplify right side
    380,648,009.40x = 113,272,130,336,341,712
  5. Step 5: Solve for x
    x = 113,272,130,336,341,712/380,648,009.40
  6. Step 6: Final answer
    x = 297,577,098.89

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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.