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Finding the Fourth Proportional to 1,209,737.60, 1,815,189.60 and 853,985.60

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Solution

The fourth proportional to 1,209,737.60, 1,815,189.60 and 853,985.60 is: 1,281,390.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209,737.60 : 1,815,189.60 = 853,985.60 : x
  2. Step 2: Convert to fraction form
    1,209,737.60/1,815,189.60 = 853,985.60/x
  3. Step 3: Cross multiply
    1,209,737.60x = 1,815,189.60 × 853,985.60
  4. Step 4: Simplify right side
    1,209,737.60x = 1,550,145,779,669.76
  5. Step 5: Solve for x
    x = 1,550,145,779,669.76/1,209,737.60
  6. Step 6: Final answer
    x = 1,281,390.10

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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.