Home / 644,962.28-890,028.34-369,311.18

Finding the Fourth Proportional to 644,962.28, 890,028.34 and 369,311.18

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Solution

The fourth proportional to 644,962.28, 890,028.34 and 369,311.18 is: 509,638.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,962.28 : 890,028.34 = 369,311.18 : x
  2. Step 2: Convert to fraction form
    644,962.28/890,028.34 = 369,311.18/x
  3. Step 3: Cross multiply
    644,962.28x = 890,028.34 × 369,311.18
  4. Step 4: Simplify right side
    644,962.28x = 328,697,411,105.42
  5. Step 5: Solve for x
    x = 328,697,411,105.42/644,962.28
  6. Step 6: Final answer
    x = 509,638.20

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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.