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Finding the Fourth Proportional to 456,934.40, 685,401.60 and 425,830.40

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Solution

The fourth proportional to 456,934.40, 685,401.60 and 425,830.40 is: 638,745.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,934.40 : 685,401.60 = 425,830.40 : x
  2. Step 2: Convert to fraction form
    456,934.40/685,401.60 = 425,830.40/x
  3. Step 3: Cross multiply
    456,934.40x = 685,401.60 × 425,830.40
  4. Step 4: Simplify right side
    456,934.40x = 291,864,837,488.64
  5. Step 5: Solve for x
    x = 291,864,837,488.64/456,934.40
  6. Step 6: Final answer
    x = 638,745.60

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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.