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Finding the Fourth Proportional to 677,460, 934,893.36 and 390,980.10

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Solution

The fourth proportional to 677,460, 934,893.36 and 390,980.10 is: 539,551.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,460 : 934,893.36 = 390,980.10 : x
  2. Step 2: Convert to fraction form
    677,460/934,893.36 = 390,980.10/x
  3. Step 3: Cross multiply
    677,460x = 934,893.36 × 390,980.10
  4. Step 4: Simplify right side
    677,460x = 365,524,699,382.14
  5. Step 5: Solve for x
    x = 365,524,699,382.14/677,460
  6. Step 6: Final answer
    x = 539,551.71

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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.