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Finding the Fourth Proportional to 636,885.76, 878,909.32 and 346,498.98

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Solution

The fourth proportional to 636,885.76, 878,909.32 and 346,498.98 is: 478,172.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,885.76 : 878,909.32 = 346,498.98 : x
  2. Step 2: Convert to fraction form
    636,885.76/878,909.32 = 346,498.98/x
  3. Step 3: Cross multiply
    636,885.76x = 878,909.32 × 346,498.98
  4. Step 4: Simplify right side
    636,885.76x = 304,541,183,758.74
  5. Step 5: Solve for x
    x = 304,541,183,758.74/636,885.76
  6. Step 6: Final answer
    x = 478,172.39

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1.5x scale

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.