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Finding the Fourth Proportional to 636,461.79, 878,320.40 and 350,000.43

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Solution

The fourth proportional to 636,461.79, 878,320.40 and 350,000.43 is: 483,002.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,461.79 : 878,320.40 = 350,000.43 : x
  2. Step 2: Convert to fraction form
    636,461.79/878,320.40 = 350,000.43/x
  3. Step 3: Cross multiply
    636,461.79x = 878,320.40 × 350,000.43
  4. Step 4: Simplify right side
    636,461.79x = 307,412,515,927.77
  5. Step 5: Solve for x
    x = 307,412,515,927.77/636,461.79
  6. Step 6: Final answer
    x = 483,002.31

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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.