Home / 1,209,145.60-1,668,586.51-665,281.76

Finding the Fourth Proportional to 1,209,145.60, 1,668,586.51 and 665,281.76

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Solution

The fourth proportional to 1,209,145.60, 1,668,586.51 and 665,281.76 is: 918,069.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209,145.60 : 1,668,586.51 = 665,281.76 : x
  2. Step 2: Convert to fraction form
    1,209,145.60/1,668,586.51 = 665,281.76/x
  3. Step 3: Cross multiply
    1,209,145.60x = 1,668,586.51 × 665,281.76
  4. Step 4: Simplify right side
    1,209,145.60x = 1,110,080,170,085.06
  5. Step 5: Solve for x
    x = 1,110,080,170,085.06/1,209,145.60
  6. Step 6: Final answer
    x = 918,069.89

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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.