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Finding the Fourth Proportional to 978,425,079.60, 1,467,637,619.40 and 903,598,186.80

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Solution

The fourth proportional to 978,425,079.60, 1,467,637,619.40 and 903,598,186.80 is: 1,355,397,280.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,425,079.60 : 1,467,637,619.40 = 903,598,186.80 : x
  2. Step 2: Convert to fraction form
    978,425,079.60/1,467,637,619.40 = 903,598,186.80/x
  3. Step 3: Cross multiply
    978,425,079.60x = 1,467,637,619.40 × 903,598,186.80
  4. Step 4: Simplify right side
    978,425,079.60x = 1,326,154,691,769,308,416
  5. Step 5: Solve for x
    x = 1,326,154,691,769,308,416/978,425,079.60
  6. Step 6: Final answer
    x = 1,355,397,280.20

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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.