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Finding the Fourth Proportional to 1,260,707,048.80, 1,891,344,008.40 and 742,870,938.40

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Solution

The fourth proportional to 1,260,707,048.80, 1,891,344,008.40 and 742,870,938.40 is: 1,114,473,421.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260,707,048.80 : 1,891,344,008.40 = 742,870,938.40 : x
  2. Step 2: Convert to fraction form
    1,260,707,048.80/1,891,344,008.40 = 742,870,938.40/x
  3. Step 3: Cross multiply
    1,260,707,048.80x = 1,891,344,008.40 × 742,870,938.40
  4. Step 4: Simplify right side
    1,260,707,048.80x = 1,405,024,498,357,325,568
  5. Step 5: Solve for x
    x = 1,405,024,498,357,325,568/1,260,707,048.80
  6. Step 6: Final answer
    x = 1,114,473,421.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.