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Finding the Fourth Proportional to 649,507.60, 974,261.40 and 436,931.20

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Solution

The fourth proportional to 649,507.60, 974,261.40 and 436,931.20 is: 655,396.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    649,507.60 : 974,261.40 = 436,931.20 : x
  2. Step 2: Convert to fraction form
    649,507.60/974,261.40 = 436,931.20/x
  3. Step 3: Cross multiply
    649,507.60x = 974,261.40 × 436,931.20
  4. Step 4: Simplify right side
    649,507.60x = 425,685,202,615.68
  5. Step 5: Solve for x
    x = 425,685,202,615.68/649,507.60
  6. Step 6: Final answer
    x = 655,396.80

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Double scale
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Similar ratio
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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.