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Finding the Fourth Proportional to 978,357.40, 1,467,536.10 and 438,612.70

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Solution

The fourth proportional to 978,357.40, 1,467,536.10 and 438,612.70 is: 657,919.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,357.40 : 1,467,536.10 = 438,612.70 : x
  2. Step 2: Convert to fraction form
    978,357.40/1,467,536.10 = 438,612.70/x
  3. Step 3: Cross multiply
    978,357.40x = 1,467,536.10 × 438,612.70
  4. Step 4: Simplify right side
    978,357.40x = 643,679,971,168.47
  5. Step 5: Solve for x
    x = 643,679,971,168.47/978,357.40
  6. Step 6: Final answer
    x = 657,919.05

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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.