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Finding the Fourth Proportional to 402,668.55, 555,686.19 and 218,907.50

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Solution

The fourth proportional to 402,668.55, 555,686.19 and 218,907.50 is: 302,094.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,668.55 : 555,686.19 = 218,907.50 : x
  2. Step 2: Convert to fraction form
    402,668.55/555,686.19 = 218,907.50/x
  3. Step 3: Cross multiply
    402,668.55x = 555,686.19 × 218,907.50
  4. Step 4: Simplify right side
    402,668.55x = 121,643,871,858.99
  5. Step 5: Solve for x
    x = 121,643,871,858.99/402,668.55
  6. Step 6: Final answer
    x = 302,094.30

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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.