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Finding the Fourth Proportional to 520,038.50, 717,653.13 and 281,574.50

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Solution

The fourth proportional to 520,038.50, 717,653.13 and 281,574.50 is: 388,572.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,038.50 : 717,653.13 = 281,574.50 : x
  2. Step 2: Convert to fraction form
    520,038.50/717,653.13 = 281,574.50/x
  3. Step 3: Cross multiply
    520,038.50x = 717,653.13 × 281,574.50
  4. Step 4: Simplify right side
    520,038.50x = 202,072,821,253.19
  5. Step 5: Solve for x
    x = 202,072,821,253.19/520,038.50
  6. Step 6: Final answer
    x = 388,572.81

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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.