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Finding the Fourth Proportional to 615,694.10, 921,572.85 and 438,547.10

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Solution

The fourth proportional to 615,694.10, 921,572.85 and 438,547.10 is: 656,418.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,694.10 : 921,572.85 = 438,547.10 : x
  2. Step 2: Convert to fraction form
    615,694.10/921,572.85 = 438,547.10/x
  3. Step 3: Cross multiply
    615,694.10x = 921,572.85 × 438,547.10
  4. Step 4: Simplify right side
    615,694.10x = 404,153,100,806.24
  5. Step 5: Solve for x
    x = 404,153,100,806.24/615,694.10
  6. Step 6: Final answer
    x = 656,418.67

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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.