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Finding the Fourth Proportional to 431,581.76, 645,638.04 and 373,045.76

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Solution

The fourth proportional to 431,581.76, 645,638.04 and 373,045.76 is: 558,069.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,581.76 : 645,638.04 = 373,045.76 : x
  2. Step 2: Convert to fraction form
    431,581.76/645,638.04 = 373,045.76/x
  3. Step 3: Cross multiply
    431,581.76x = 645,638.04 × 373,045.76
  4. Step 4: Simplify right side
    431,581.76x = 240,852,533,316.71
  5. Step 5: Solve for x
    x = 240,852,533,316.71/431,581.76
  6. Step 6: Final answer
    x = 558,069.31

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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.