Home / 438,325.40-657,488.10-420,610.70

Finding the Fourth Proportional to 438,325.40, 657,488.10 and 420,610.70

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Solution

The fourth proportional to 438,325.40, 657,488.10 and 420,610.70 is: 630,916.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,325.40 : 657,488.10 = 420,610.70 : x
  2. Step 2: Convert to fraction form
    438,325.40/657,488.10 = 420,610.70/x
  3. Step 3: Cross multiply
    438,325.40x = 657,488.10 × 420,610.70
  4. Step 4: Simplify right side
    438,325.40x = 276,546,529,982.67
  5. Step 5: Solve for x
    x = 276,546,529,982.67/438,325.40
  6. Step 6: Final answer
    x = 630,916.05

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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.