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Finding the Fourth Proportional to 677,196.64, 934,290.48 and 390,789.28

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Solution

The fourth proportional to 677,196.64, 934,290.48 and 390,789.28 is: 539,150.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,196.64 : 934,290.48 = 390,789.28 : x
  2. Step 2: Convert to fraction form
    677,196.64/934,290.48 = 390,789.28/x
  3. Step 3: Cross multiply
    677,196.64x = 934,290.48 × 390,789.28
  4. Step 4: Simplify right side
    677,196.64x = 365,110,703,990.05
  5. Step 5: Solve for x
    x = 365,110,703,990.05/677,196.64
  6. Step 6: Final answer
    x = 539,150.20

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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.