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Finding the Fourth Proportional to 710,257.50, 980,149.55 and 387,967.68

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Solution

The fourth proportional to 710,257.50, 980,149.55 and 387,967.68 is: 535,392.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,257.50 : 980,149.55 = 387,967.68 : x
  2. Step 2: Convert to fraction form
    710,257.50/980,149.55 = 387,967.68/x
  3. Step 3: Cross multiply
    710,257.50x = 980,149.55 × 387,967.68
  4. Step 4: Simplify right side
    710,257.50x = 380,266,345,026.71
  5. Step 5: Solve for x
    x = 380,266,345,026.71/710,257.50
  6. Step 6: Final answer
    x = 535,392.23

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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.