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Finding the Fourth Proportional to 677,384.46, 934,782.84 and 390,898.40

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Solution

The fourth proportional to 677,384.46, 934,782.84 and 390,898.40 is: 539,435.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,384.46 : 934,782.84 = 390,898.40 : x
  2. Step 2: Convert to fraction form
    677,384.46/934,782.84 = 390,898.40/x
  3. Step 3: Cross multiply
    677,384.46x = 934,782.84 × 390,898.40
  4. Step 4: Simplify right side
    677,384.46x = 365,405,111,829.54
  5. Step 5: Solve for x
    x = 365,405,111,829.54/677,384.46
  6. Step 6: Final answer
    x = 539,435.33

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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.