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Finding the Fourth Proportional to 1,152,641.40, 1,728,962.10 and 621,200.40

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Solution

The fourth proportional to 1,152,641.40, 1,728,962.10 and 621,200.40 is: 931,800.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,152,641.40 : 1,728,962.10 = 621,200.40 : x
  2. Step 2: Convert to fraction form
    1,152,641.40/1,728,962.10 = 621,200.40/x
  3. Step 3: Cross multiply
    1,152,641.40x = 1,728,962.10 × 621,200.40
  4. Step 4: Simplify right side
    1,152,641.40x = 1,074,031,948,104.84
  5. Step 5: Solve for x
    x = 1,074,031,948,104.84/1,152,641.40
  6. Step 6: Final answer
    x = 931,800.60

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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.