Home / 386,438,812.20-579,490,256.70-127,553,999.40

Finding the Fourth Proportional to 386,438,812.20, 579,490,256.70 and 127,553,999.40

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Solution

The fourth proportional to 386,438,812.20, 579,490,256.70 and 127,553,999.40 is: 191,275,559.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,438,812.20 : 579,490,256.70 = 127,553,999.40 : x
  2. Step 2: Convert to fraction form
    386,438,812.20/579,490,256.70 = 127,553,999.40/x
  3. Step 3: Cross multiply
    386,438,812.20x = 579,490,256.70 × 127,553,999.40
  4. Step 4: Simplify right side
    386,438,812.20x = 73,916,299,855,417,648
  5. Step 5: Solve for x
    x = 73,916,299,855,417,648/386,438,812.20
  6. Step 6: Final answer
    x = 191,275,559.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.