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Finding the Fourth Proportional to 811,396.64, 1,119,713.54 and 448,820.21

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Solution

The fourth proportional to 811,396.64, 1,119,713.54 and 448,820.21 is: 619,364.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,396.64 : 1,119,713.54 = 448,820.21 : x
  2. Step 2: Convert to fraction form
    811,396.64/1,119,713.54 = 448,820.21/x
  3. Step 3: Cross multiply
    811,396.64x = 1,119,713.54 × 448,820.21
  4. Step 4: Simplify right side
    811,396.64x = 502,550,058,319.98
  5. Step 5: Solve for x
    x = 502,550,058,319.98/811,396.64
  6. Step 6: Final answer
    x = 619,364.24

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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.