Home / 921,859,143.28-1,272,088,712.88-519,950,744.20

Finding the Fourth Proportional to 921,859,143.28, 1,272,088,712.88 and 519,950,744.20

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Solution

The fourth proportional to 921,859,143.28, 1,272,088,712.88 and 519,950,744.20 is: 717,488,650.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,859,143.28 : 1,272,088,712.88 = 519,950,744.20 : x
  2. Step 2: Convert to fraction form
    921,859,143.28/1,272,088,712.88 = 519,950,744.20/x
  3. Step 3: Cross multiply
    921,859,143.28x = 1,272,088,712.88 × 519,950,744.20
  4. Step 4: Simplify right side
    921,859,143.28x = 661,423,472,950,376,192
  5. Step 5: Solve for x
    x = 661,423,472,950,376,192/921,859,143.28
  6. Step 6: Final answer
    x = 717,488,650.81

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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.