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Finding the Fourth Proportional to 478,506.90, 718,829.55 and 399,774.90

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Solution

The fourth proportional to 478,506.90, 718,829.55 and 399,774.90 is: 600,555.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,506.90 : 718,829.55 = 399,774.90 : x
  2. Step 2: Convert to fraction form
    478,506.90/718,829.55 = 399,774.90/x
  3. Step 3: Cross multiply
    478,506.90x = 718,829.55 × 399,774.90
  4. Step 4: Simplify right side
    478,506.90x = 287,370,011,468.30
  5. Step 5: Solve for x
    x = 287,370,011,468.30/478,506.90
  6. Step 6: Final answer
    x = 600,555.63

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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.