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Finding the Fourth Proportional to 605,427.40, 910,109.40 and 429,155.20

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Solution

The fourth proportional to 605,427.40, 910,109.40 and 429,155.20 is: 645,128.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,427.40 : 910,109.40 = 429,155.20 : x
  2. Step 2: Convert to fraction form
    605,427.40/910,109.40 = 429,155.20/x
  3. Step 3: Cross multiply
    605,427.40x = 910,109.40 × 429,155.20
  4. Step 4: Simplify right side
    605,427.40x = 390,578,181,578.88
  5. Step 5: Solve for x
    x = 390,578,181,578.88/605,427.40
  6. Step 6: Final answer
    x = 645,128.02

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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.