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Finding the Fourth Proportional to 634,408, 875,560.80 and 366,136

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Solution

The fourth proportional to 634,408, 875,560.80 and 366,136 is: 505,312.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    634,408 : 875,560.80 = 366,136 : x
  2. Step 2: Convert to fraction form
    634,408/875,560.80 = 366,136/x
  3. Step 3: Cross multiply
    634,408x = 875,560.80 × 366,136
  4. Step 4: Simplify right side
    634,408x = 320,574,329,068.80
  5. Step 5: Solve for x
    x = 320,574,329,068.80/634,408
  6. Step 6: Final answer
    x = 505,312.56

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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.