Home / 919,416.72-1,267,987.50-643,633.32

Finding the Fourth Proportional to 919,416.72, 1,267,987.50 and 643,633.32

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Solution

The fourth proportional to 919,416.72, 1,267,987.50 and 643,633.32 is: 887,648.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,416.72 : 1,267,987.50 = 643,633.32 : x
  2. Step 2: Convert to fraction form
    919,416.72/1,267,987.50 = 643,633.32/x
  3. Step 3: Cross multiply
    919,416.72x = 1,267,987.50 × 643,633.32
  4. Step 4: Simplify right side
    919,416.72x = 816,119,004,343.50
  5. Step 5: Solve for x
    x = 816,119,004,343.50/919,416.72
  6. Step 6: Final answer
    x = 887,648.64

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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.