Home / 642,865.48-887,166.39-352,457.80

Finding the Fourth Proportional to 642,865.48, 887,166.39 and 352,457.80

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Solution

The fourth proportional to 642,865.48, 887,166.39 and 352,457.80 is: 486,398.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,865.48 : 887,166.39 = 352,457.80 : x
  2. Step 2: Convert to fraction form
    642,865.48/887,166.39 = 352,457.80/x
  3. Step 3: Cross multiply
    642,865.48x = 887,166.39 × 352,457.80
  4. Step 4: Simplify right side
    642,865.48x = 312,688,714,053.34
  5. Step 5: Solve for x
    x = 312,688,714,053.34/642,865.48
  6. Step 6: Final answer
    x = 486,398.36

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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.