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Finding the Fourth Proportional to 636,979.80, 879,005.77 and 346,592.58

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Solution

The fourth proportional to 636,979.80, 879,005.77 and 346,592.58 is: 478,283.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,979.80 : 879,005.77 = 346,592.58 : x
  2. Step 2: Convert to fraction form
    636,979.80/879,005.77 = 346,592.58/x
  3. Step 3: Cross multiply
    636,979.80x = 879,005.77 × 346,592.58
  4. Step 4: Simplify right side
    636,979.80x = 304,656,877,659.19
  5. Step 5: Solve for x
    x = 304,656,877,659.19/636,979.80
  6. Step 6: Final answer
    x = 478,283.42

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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.