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Finding the Fourth Proportional to 875,491.20, 1,208,779.20 and 660,873.60

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Solution

The fourth proportional to 875,491.20, 1,208,779.20 and 660,873.60 is: 912,459.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    875,491.20 : 1,208,779.20 = 660,873.60 : x
  2. Step 2: Convert to fraction form
    875,491.20/1,208,779.20 = 660,873.60/x
  3. Step 3: Cross multiply
    875,491.20x = 1,208,779.20 × 660,873.60
  4. Step 4: Simplify right side
    875,491.20x = 798,850,261,509.12
  5. Step 5: Solve for x
    x = 798,850,261,509.12/875,491.20
  6. Step 6: Final answer
    x = 912,459.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.