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Finding the Fourth Proportional to 808,918,274.60, 1,213,377,411.90 and 672,757,404.20

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Solution

The fourth proportional to 808,918,274.60, 1,213,377,411.90 and 672,757,404.20 is: 1,009,136,106.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,918,274.60 : 1,213,377,411.90 = 672,757,404.20 : x
  2. Step 2: Convert to fraction form
    808,918,274.60/1,213,377,411.90 = 672,757,404.20/x
  3. Step 3: Cross multiply
    808,918,274.60x = 1,213,377,411.90 × 672,757,404.20
  4. Step 4: Simplify right side
    808,918,274.60x = 816,308,637,944,758,272
  5. Step 5: Solve for x
    x = 816,308,637,944,758,272/808,918,274.60
  6. Step 6: Final answer
    x = 1,009,136,106.30

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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.