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Finding the Fourth Proportional to 525,885.60, 788,828.40 and 315,415.20

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Solution

The fourth proportional to 525,885.60, 788,828.40 and 315,415.20 is: 473,122.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,885.60 : 788,828.40 = 315,415.20 : x
  2. Step 2: Convert to fraction form
    525,885.60/788,828.40 = 315,415.20/x
  3. Step 3: Cross multiply
    525,885.60x = 788,828.40 × 315,415.20
  4. Step 4: Simplify right side
    525,885.60x = 248,808,467,551.68
  5. Step 5: Solve for x
    x = 248,808,467,551.68/525,885.60
  6. Step 6: Final answer
    x = 473,122.80

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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.