Home / 1,385,085.12-1,912,212.56-1,055,813.13

Finding the Fourth Proportional to 1,385,085.12, 1,912,212.56 and 1,055,813.13

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Solution

The fourth proportional to 1,385,085.12, 1,912,212.56 and 1,055,813.13 is: 1,457,628.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385,085.12 : 1,912,212.56 = 1,055,813.13 : x
  2. Step 2: Convert to fraction form
    1,385,085.12/1,912,212.56 = 1,055,813.13/x
  3. Step 3: Cross multiply
    1,385,085.12x = 1,912,212.56 × 1,055,813.13
  4. Step 4: Simplify right side
    1,385,085.12x = 2,018,939,130,838.45
  5. Step 5: Solve for x
    x = 2,018,939,130,838.45/1,385,085.12
  6. Step 6: Final answer
    x = 1,457,628.20

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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.