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Finding the Fourth Proportional to 390,368.07, 538,700.88 and 220,598.55

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Solution

The fourth proportional to 390,368.07, 538,700.88 and 220,598.55 is: 304,422.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,368.07 : 538,700.88 = 220,598.55 : x
  2. Step 2: Convert to fraction form
    390,368.07/538,700.88 = 220,598.55/x
  3. Step 3: Cross multiply
    390,368.07x = 538,700.88 × 220,598.55
  4. Step 4: Simplify right side
    390,368.07x = 118,836,633,011.72
  5. Step 5: Solve for x
    x = 118,836,633,011.72/390,368.07
  6. Step 6: Final answer
    x = 304,422.01

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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.