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Finding the Fourth Proportional to 640,482.84, 960,689.61 and 324,931.55

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Solution

The fourth proportional to 640,482.84, 960,689.61 and 324,931.55 is: 487,379.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,482.84 : 960,689.61 = 324,931.55 : x
  2. Step 2: Convert to fraction form
    640,482.84/960,689.61 = 324,931.55/x
  3. Step 3: Cross multiply
    640,482.84x = 960,689.61 × 324,931.55
  4. Step 4: Simplify right side
    640,482.84x = 312,158,359,242.75
  5. Step 5: Solve for x
    x = 312,158,359,242.75/640,482.84
  6. Step 6: Final answer
    x = 487,379.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.