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Finding the Fourth Proportional to 675,390.79, 932,089.87 and 385,009.28

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Solution

The fourth proportional to 675,390.79, 932,089.87 and 385,009.28 is: 531,341.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    675,390.79 : 932,089.87 = 385,009.28 : x
  2. Step 2: Convert to fraction form
    675,390.79/932,089.87 = 385,009.28/x
  3. Step 3: Cross multiply
    675,390.79x = 932,089.87 × 385,009.28
  4. Step 4: Simplify right side
    675,390.79x = 358,863,249,743.99
  5. Step 5: Solve for x
    x = 358,863,249,743.99/675,390.79
  6. Step 6: Final answer
    x = 531,341.64

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Similar ratio
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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.