Home / 665,331.19-918,158.47-378,851.51

Finding the Fourth Proportional to 665,331.19, 918,158.47 and 378,851.51

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Solution

The fourth proportional to 665,331.19, 918,158.47 and 378,851.51 is: 522,815.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,331.19 : 918,158.47 = 378,851.51 : x
  2. Step 2: Convert to fraction form
    665,331.19/918,158.47 = 378,851.51/x
  3. Step 3: Cross multiply
    665,331.19x = 918,158.47 × 378,851.51
  4. Step 4: Simplify right side
    665,331.19x = 347,845,724,127.06
  5. Step 5: Solve for x
    x = 347,845,724,127.06/665,331.19
  6. Step 6: Final answer
    x = 522,815.90

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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.