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Finding the Fourth Proportional to 403,952.90, 606,257.40 and 390,830.90

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Solution

The fourth proportional to 403,952.90, 606,257.40 and 390,830.90 is: 586,563.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,952.90 : 606,257.40 = 390,830.90 : x
  2. Step 2: Convert to fraction form
    403,952.90/606,257.40 = 390,830.90/x
  3. Step 3: Cross multiply
    403,952.90x = 606,257.40 × 390,830.90
  4. Step 4: Simplify right side
    403,952.90x = 236,944,125,273.66
  5. Step 5: Solve for x
    x = 236,944,125,273.66/403,952.90
  6. Step 6: Final answer
    x = 586,563.74

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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.