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Finding the Fourth Proportional to 889,985.80, 1,334,978.70 and 535,400.20

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Solution

The fourth proportional to 889,985.80, 1,334,978.70 and 535,400.20 is: 803,100.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    889,985.80 : 1,334,978.70 = 535,400.20 : x
  2. Step 2: Convert to fraction form
    889,985.80/1,334,978.70 = 535,400.20/x
  3. Step 3: Cross multiply
    889,985.80x = 1,334,978.70 × 535,400.20
  4. Step 4: Simplify right side
    889,985.80x = 714,747,862,975.74
  5. Step 5: Solve for x
    x = 714,747,862,975.74/889,985.80
  6. Step 6: Final answer
    x = 803,100.30

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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.