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Finding the Fourth Proportional to 641,681.77, 885,482.80 and 355,184.77

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Solution

The fourth proportional to 641,681.77, 885,482.80 and 355,184.77 is: 490,133.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,681.77 : 885,482.80 = 355,184.77 : x
  2. Step 2: Convert to fraction form
    641,681.77/885,482.80 = 355,184.77/x
  3. Step 3: Cross multiply
    641,681.77x = 885,482.80 × 355,184.77
  4. Step 4: Simplify right side
    641,681.77x = 314,510,004,656.96
  5. Step 5: Solve for x
    x = 314,510,004,656.96/641,681.77
  6. Step 6: Final answer
    x = 490,133.93

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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.