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Finding the Fourth Proportional to 709,783.68, 979,442.64 and 403,778.64

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Solution

The fourth proportional to 709,783.68, 979,442.64 and 403,778.64 is: 557,181.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,783.68 : 979,442.64 = 403,778.64 : x
  2. Step 2: Convert to fraction form
    709,783.68/979,442.64 = 403,778.64/x
  3. Step 3: Cross multiply
    709,783.68x = 979,442.64 × 403,778.64
  4. Step 4: Simplify right side
    709,783.68x = 395,478,017,137.21
  5. Step 5: Solve for x
    x = 395,478,017,137.21/709,783.68
  6. Step 6: Final answer
    x = 557,181.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.