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Finding the Fourth Proportional to 1,235,778,708.65, 1,703,751,849.45 and 891,772,193.22

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Solution

The fourth proportional to 1,235,778,708.65, 1,703,751,849.45 and 891,772,193.22 is: 1,229,474,591.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,235,778,708.65 : 1,703,751,849.45 = 891,772,193.22 : x
  2. Step 2: Convert to fraction form
    1,235,778,708.65/1,703,751,849.45 = 891,772,193.22/x
  3. Step 3: Cross multiply
    1,235,778,708.65x = 1,703,751,849.45 × 891,772,193.22
  4. Step 4: Simplify right side
    1,235,778,708.65x = 1,519,358,523,486,657,792
  5. Step 5: Solve for x
    x = 1,519,358,523,486,657,792/1,235,778,708.65
  6. Step 6: Final answer
    x = 1,229,474,591.90

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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.