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Finding the Fourth Proportional to 1,425,136.48, 1,965,742.16 and 916,482.40

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Solution

The fourth proportional to 1,425,136.48, 1,965,742.16 and 916,482.40 is: 1,264,137.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425,136.48 : 1,965,742.16 = 916,482.40 : x
  2. Step 2: Convert to fraction form
    1,425,136.48/1,965,742.16 = 916,482.40/x
  3. Step 3: Cross multiply
    1,425,136.48x = 1,965,742.16 × 916,482.40
  4. Step 4: Simplify right side
    1,425,136.48x = 1,801,568,092,577.98
  5. Step 5: Solve for x
    x = 1,801,568,092,577.98/1,425,136.48
  6. Step 6: Final answer
    x = 1,264,137.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.