Home / 1,209,316,914.78-1,668,750,947.56-673,428,085.76

Finding the Fourth Proportional to 1,209,316,914.78, 1,668,750,947.56 and 673,428,085.76

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Solution

The fourth proportional to 1,209,316,914.78, 1,668,750,947.56 and 673,428,085.76 is: 929,271,510.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209,316,914.78 : 1,668,750,947.56 = 673,428,085.76 : x
  2. Step 2: Convert to fraction form
    1,209,316,914.78/1,668,750,947.56 = 673,428,085.76/x
  3. Step 3: Cross multiply
    1,209,316,914.78x = 1,668,750,947.56 × 673,428,085.76
  4. Step 4: Simplify right side
    1,209,316,914.78x = 1,123,783,756,225,516,928
  5. Step 5: Solve for x
    x = 1,123,783,756,225,516,928/1,209,316,914.78
  6. Step 6: Final answer
    x = 929,271,510.63

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Double scale
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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.