Home / 692,139.80-1,038,209.70-407,538.20

Finding the Fourth Proportional to 692,139.80, 1,038,209.70 and 407,538.20

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Solution

The fourth proportional to 692,139.80, 1,038,209.70 and 407,538.20 is: 611,307.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,139.80 : 1,038,209.70 = 407,538.20 : x
  2. Step 2: Convert to fraction form
    692,139.80/1,038,209.70 = 407,538.20/x
  3. Step 3: Cross multiply
    692,139.80x = 1,038,209.70 × 407,538.20
  4. Step 4: Simplify right side
    692,139.80x = 423,110,112,360.54
  5. Step 5: Solve for x
    x = 423,110,112,360.54/692,139.80
  6. Step 6: Final answer
    x = 611,307.30

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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.