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Finding the Fourth Proportional to 487,968.60, 731,952.90 and 172,457.40

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Solution

The fourth proportional to 487,968.60, 731,952.90 and 172,457.40 is: 258,686.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,968.60 : 731,952.90 = 172,457.40 : x
  2. Step 2: Convert to fraction form
    487,968.60/731,952.90 = 172,457.40/x
  3. Step 3: Cross multiply
    487,968.60x = 731,952.90 × 172,457.40
  4. Step 4: Simplify right side
    487,968.60x = 126,230,694,056.46
  5. Step 5: Solve for x
    x = 126,230,694,056.46/487,968.60
  6. Step 6: Final answer
    x = 258,686.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.