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Finding the Fourth Proportional to 390,457.77, 585,776.87 and 165,825.53

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Solution

The fourth proportional to 390,457.77, 585,776.87 and 165,825.53 is: 248,776.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,457.77 : 585,776.87 = 165,825.53 : x
  2. Step 2: Convert to fraction form
    390,457.77/585,776.87 = 165,825.53/x
  3. Step 3: Cross multiply
    390,457.77x = 585,776.87 × 165,825.53
  4. Step 4: Simplify right side
    390,457.77x = 97,136,761,808.50
  5. Step 5: Solve for x
    x = 97,136,761,808.50/390,457.77
  6. Step 6: Final answer
    x = 248,776.61

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1.5x scale

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.