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Finding the Fourth Proportional to 636,975.15, 878,999.36 and 346,587.91

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Solution

The fourth proportional to 636,975.15, 878,999.36 and 346,587.91 is: 478,276.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,975.15 : 878,999.36 = 346,587.91 : x
  2. Step 2: Convert to fraction form
    636,975.15/878,999.36 = 346,587.91/x
  3. Step 3: Cross multiply
    636,975.15x = 878,999.36 × 346,587.91
  4. Step 4: Simplify right side
    636,975.15x = 304,650,547,143.30
  5. Step 5: Solve for x
    x = 304,650,547,143.30/636,975.15
  6. Step 6: Final answer
    x = 478,276.97

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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.