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Finding the Fourth Proportional to 525,510.48, 724,989.78 and 388,018.92

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Solution

The fourth proportional to 525,510.48, 724,989.78 and 388,018.92 is: 535,307.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,510.48 : 724,989.78 = 388,018.92 : x
  2. Step 2: Convert to fraction form
    525,510.48/724,989.78 = 388,018.92/x
  3. Step 3: Cross multiply
    525,510.48x = 724,989.78 × 388,018.92
  4. Step 4: Simplify right side
    525,510.48x = 281,309,751,446.64
  5. Step 5: Solve for x
    x = 281,309,751,446.64/525,510.48
  6. Step 6: Final answer
    x = 535,307.60

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1.5x scale

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.