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Finding the Fourth Proportional to 612,656.79, 919,109.75 and 213,328.70

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Solution

The fourth proportional to 612,656.79, 919,109.75 and 213,328.70 is: 320,036.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,656.79 : 919,109.75 = 213,328.70 : x
  2. Step 2: Convert to fraction form
    612,656.79/919,109.75 = 213,328.70/x
  3. Step 3: Cross multiply
    612,656.79x = 919,109.75 × 213,328.70
  4. Step 4: Simplify right side
    612,656.79x = 196,072,482,462.63
  5. Step 5: Solve for x
    x = 196,072,482,462.63/612,656.79
  6. Step 6: Final answer
    x = 320,036.41

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1.5x scale

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.