Home / 1,189,142.99-1,641,009-645,264.94

Finding the Fourth Proportional to 1,189,142.99, 1,641,009 and 645,264.94

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Solution

The fourth proportional to 1,189,142.99, 1,641,009 and 645,264.94 is: 890,461.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,142.99 : 1,641,009 = 645,264.94 : x
  2. Step 2: Convert to fraction form
    1,189,142.99/1,641,009 = 645,264.94/x
  3. Step 3: Cross multiply
    1,189,142.99x = 1,641,009 × 645,264.94
  4. Step 4: Simplify right side
    1,189,142.99x = 1,058,885,573,924.46
  5. Step 5: Solve for x
    x = 1,058,885,573,924.46/1,189,142.99
  6. Step 6: Final answer
    x = 890,461.10

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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.