Home / 578,646.20-867,969.30-487,407.80

Finding the Fourth Proportional to 578,646.20, 867,969.30 and 487,407.80

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Solution

The fourth proportional to 578,646.20, 867,969.30 and 487,407.80 is: 731,111.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,646.20 : 867,969.30 = 487,407.80 : x
  2. Step 2: Convert to fraction form
    578,646.20/867,969.30 = 487,407.80/x
  3. Step 3: Cross multiply
    578,646.20x = 867,969.30 × 487,407.80
  4. Step 4: Simplify right side
    578,646.20x = 423,055,006,980.54
  5. Step 5: Solve for x
    x = 423,055,006,980.54/578,646.20
  6. Step 6: Final answer
    x = 731,111.70

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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.