Home / 1,385,272.50-1,911,994.29-812,497.20

Finding the Fourth Proportional to 1,385,272.50, 1,911,994.29 and 812,497.20

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Solution

The fourth proportional to 1,385,272.50, 1,911,994.29 and 812,497.20 is: 1,121,432.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385,272.50 : 1,911,994.29 = 812,497.20 : x
  2. Step 2: Convert to fraction form
    1,385,272.50/1,911,994.29 = 812,497.20/x
  3. Step 3: Cross multiply
    1,385,272.50x = 1,911,994.29 × 812,497.20
  4. Step 4: Simplify right side
    1,385,272.50x = 1,553,490,007,040.99
  5. Step 5: Solve for x
    x = 1,553,490,007,040.99/1,385,272.50
  6. Step 6: Final answer
    x = 1,121,432.79

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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.