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Finding the Fourth Proportional to 630,139.40, 944,345.10 and 404,808.20

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Solution

The fourth proportional to 630,139.40, 944,345.10 and 404,808.20 is: 606,657.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,139.40 : 944,345.10 = 404,808.20 : x
  2. Step 2: Convert to fraction form
    630,139.40/944,345.10 = 404,808.20/x
  3. Step 3: Cross multiply
    630,139.40x = 944,345.10 × 404,808.20
  4. Step 4: Simplify right side
    630,139.40x = 382,278,640,109.82
  5. Step 5: Solve for x
    x = 382,278,640,109.82/630,139.40
  6. Step 6: Final answer
    x = 606,657.26

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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.