Home / 644,964.28-890,031.10-369,313.18

Finding the Fourth Proportional to 644,964.28, 890,031.10 and 369,313.18

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Solution

The fourth proportional to 644,964.28, 890,031.10 and 369,313.18 is: 509,640.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,964.28 : 890,031.10 = 369,313.18 : x
  2. Step 2: Convert to fraction form
    644,964.28/890,031.10 = 369,313.18/x
  3. Step 3: Cross multiply
    644,964.28x = 890,031.10 × 369,313.18
  4. Step 4: Simplify right side
    644,964.28x = 328,700,215,839.90
  5. Step 5: Solve for x
    x = 328,700,215,839.90/644,964.28
  6. Step 6: Final answer
    x = 509,640.96

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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.