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Finding the Fourth Proportional to 649,820.60, 974,730.90 and 640,489.40

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Solution

The fourth proportional to 649,820.60, 974,730.90 and 640,489.40 is: 960,734.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    649,820.60 : 974,730.90 = 640,489.40 : x
  2. Step 2: Convert to fraction form
    649,820.60/974,730.90 = 640,489.40/x
  3. Step 3: Cross multiply
    649,820.60x = 974,730.90 × 640,489.40
  4. Step 4: Simplify right side
    649,820.60x = 624,304,809,302.46
  5. Step 5: Solve for x
    x = 624,304,809,302.46/649,820.60
  6. Step 6: Final answer
    x = 960,734.10

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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.