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Finding the Fourth Proportional to 875,928.40, 1,312,337.40 and 819,941.20

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Solution

The fourth proportional to 875,928.40, 1,312,337.40 and 819,941.20 is: 1,228,456.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    875,928.40 : 1,312,337.40 = 819,941.20 : x
  2. Step 2: Convert to fraction form
    875,928.40/1,312,337.40 = 819,941.20/x
  3. Step 3: Cross multiply
    875,928.40x = 1,312,337.40 × 819,941.20
  4. Step 4: Simplify right side
    875,928.40x = 1,076,039,502,560.88
  5. Step 5: Solve for x
    x = 1,076,039,502,560.88/875,928.40
  6. Step 6: Final answer
    x = 1,228,456.00

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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.