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Finding the Fourth Proportional to 677,388, 934,787.68 and 390,901.92

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Solution

The fourth proportional to 677,388, 934,787.68 and 390,901.92 is: 539,440.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,388 : 934,787.68 = 390,901.92 : x
  2. Step 2: Convert to fraction form
    677,388/934,787.68 = 390,901.92/x
  3. Step 3: Cross multiply
    677,388x = 934,787.68 × 390,901.92
  4. Step 4: Simplify right side
    677,388x = 365,410,298,904.35
  5. Step 5: Solve for x
    x = 365,410,298,904.35/677,388
  6. Step 6: Final answer
    x = 539,440.17

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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.