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Finding the Fourth Proportional to 877,235.22, 1,210,776.42 and 555,374.40

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Solution

The fourth proportional to 877,235.22, 1,210,776.42 and 555,374.40 is: 766,538.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    877,235.22 : 1,210,776.42 = 555,374.40 : x
  2. Step 2: Convert to fraction form
    877,235.22/1,210,776.42 = 555,374.40/x
  3. Step 3: Cross multiply
    877,235.22x = 1,210,776.42 × 555,374.40
  4. Step 4: Simplify right side
    877,235.22x = 672,434,227,791.65
  5. Step 5: Solve for x
    x = 672,434,227,791.65/877,235.22
  6. Step 6: Final answer
    x = 766,538.11

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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.