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Finding the Fourth Proportional to 1,278,779,212.08, 1,764,696,685.23 and 714,272,126.40

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Solution

The fourth proportional to 1,278,779,212.08, 1,764,696,685.23 and 714,272,126.40 is: 985,685,129.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,779,212.08 : 1,764,696,685.23 = 714,272,126.40 : x
  2. Step 2: Convert to fraction form
    1,278,779,212.08/1,764,696,685.23 = 714,272,126.40/x
  3. Step 3: Cross multiply
    1,278,779,212.08x = 1,764,696,685.23 × 714,272,126.40
  4. Step 4: Simplify right side
    1,278,779,212.08x = 1,260,473,653,810,263,552
  5. Step 5: Solve for x
    x = 1,260,473,653,810,263,552/1,278,779,212.08
  6. Step 6: Final answer
    x = 985,685,129.93

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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.