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Finding the Fourth Proportional to 425,309.40, 637,964.10 and 355,325.40

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Solution

The fourth proportional to 425,309.40, 637,964.10 and 355,325.40 is: 532,988.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,309.40 : 637,964.10 = 355,325.40 : x
  2. Step 2: Convert to fraction form
    425,309.40/637,964.10 = 355,325.40/x
  3. Step 3: Cross multiply
    425,309.40x = 637,964.10 × 355,325.40
  4. Step 4: Simplify right side
    425,309.40x = 226,684,849,018.14
  5. Step 5: Solve for x
    x = 226,684,849,018.14/425,309.40
  6. Step 6: Final answer
    x = 532,988.10

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.