Home / 1,200,390.84-1,656,477.95-656,420.90

Finding the Fourth Proportional to 1,200,390.84, 1,656,477.95 and 656,420.90

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Solution

The fourth proportional to 1,200,390.84, 1,656,477.95 and 656,420.90 is: 905,827.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,200,390.84 : 1,656,477.95 = 656,420.90 : x
  2. Step 2: Convert to fraction form
    1,200,390.84/1,656,477.95 = 656,420.90/x
  3. Step 3: Cross multiply
    1,200,390.84x = 1,656,477.95 × 656,420.90
  4. Step 4: Simplify right side
    1,200,390.84x = 1,087,346,735,204.66
  5. Step 5: Solve for x
    x = 1,087,346,735,204.66/1,200,390.84
  6. Step 6: Final answer
    x = 905,827.25

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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.