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Finding the Fourth Proportional to 640,421.84, 960,598.13 and 324,870.55

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Solution

The fourth proportional to 640,421.84, 960,598.13 and 324,870.55 is: 487,288.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,421.84 : 960,598.13 = 324,870.55 : x
  2. Step 2: Convert to fraction form
    640,421.84/960,598.13 = 324,870.55/x
  3. Step 3: Cross multiply
    640,421.84x = 960,598.13 × 324,870.55
  4. Step 4: Simplify right side
    640,421.84x = 312,070,042,822.07
  5. Step 5: Solve for x
    x = 312,070,042,822.07/640,421.84
  6. Step 6: Final answer
    x = 487,288.26

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1.5x scale

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.