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Finding the Fourth Proportional to 877,817.95, 1,211,910.83 and 555,804.07

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Solution

The fourth proportional to 877,817.95, 1,211,910.83 and 555,804.07 is: 767,340.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    877,817.95 : 1,211,910.83 = 555,804.07 : x
  2. Step 2: Convert to fraction form
    877,817.95/1,211,910.83 = 555,804.07/x
  3. Step 3: Cross multiply
    877,817.95x = 1,211,910.83 × 555,804.07
  4. Step 4: Simplify right side
    877,817.95x = 673,584,968,066.55
  5. Step 5: Solve for x
    x = 673,584,968,066.55/877,817.95
  6. Step 6: Final answer
    x = 767,340.16

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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.