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Finding the Fourth Proportional to 525,509.48, 724,988.40 and 388,017.92

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Solution

The fourth proportional to 525,509.48, 724,988.40 and 388,017.92 is: 535,306.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,509.48 : 724,988.40 = 388,017.92 : x
  2. Step 2: Convert to fraction form
    525,509.48/724,988.40 = 388,017.92/x
  3. Step 3: Cross multiply
    525,509.48x = 724,988.40 × 388,017.92
  4. Step 4: Simplify right side
    525,509.48x = 281,308,490,992.13
  5. Step 5: Solve for x
    x = 281,308,490,992.13/525,509.48
  6. Step 6: Final answer
    x = 535,306.22

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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.