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Finding the Fourth Proportional to 390,612.09, 585,913.96 and 296,420.89

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Solution

The fourth proportional to 390,612.09, 585,913.96 and 296,420.89 is: 444,628.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,612.09 : 585,913.96 = 296,420.89 : x
  2. Step 2: Convert to fraction form
    390,612.09/585,913.96 = 296,420.89/x
  3. Step 3: Cross multiply
    390,612.09x = 585,913.96 × 296,420.89
  4. Step 4: Simplify right side
    390,612.09x = 173,677,137,486.62
  5. Step 5: Solve for x
    x = 173,677,137,486.62/390,612.09
  6. Step 6: Final answer
    x = 444,628.17

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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.