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Finding the Fourth Proportional to 608,411.86, 839,720.67 and 390,892.44

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Solution

The fourth proportional to 608,411.86, 839,720.67 and 390,892.44 is: 539,503.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,411.86 : 839,720.67 = 390,892.44 : x
  2. Step 2: Convert to fraction form
    608,411.86/839,720.67 = 390,892.44/x
  3. Step 3: Cross multiply
    608,411.86x = 839,720.67 × 390,892.44
  4. Step 4: Simplify right side
    608,411.86x = 328,240,461,614.74
  5. Step 5: Solve for x
    x = 328,240,461,614.74/608,411.86
  6. Step 6: Final answer
    x = 539,503.72

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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.