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Finding the Fourth Proportional to 525,885.54, 725,870.61 and 311,100.18

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Solution

The fourth proportional to 525,885.54, 725,870.61 and 311,100.18 is: 429,406.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,885.54 : 725,870.61 = 311,100.18 : x
  2. Step 2: Convert to fraction form
    525,885.54/725,870.61 = 311,100.18/x
  3. Step 3: Cross multiply
    525,885.54x = 725,870.61 × 311,100.18
  4. Step 4: Simplify right side
    525,885.54x = 225,818,477,427.71
  5. Step 5: Solve for x
    x = 225,818,477,427.71/525,885.54
  6. Step 6: Final answer
    x = 429,406.14

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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.