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Finding the Fourth Proportional to 861,840,371.10, 1,209,637,619.70 and 861,840,371.10

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Solution

The fourth proportional to 861,840,371.10, 1,209,637,619.70 and 861,840,371.10 is: 1,209,637,619.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,840,371.10 : 1,209,637,619.70 = 861,840,371.10 : x
  2. Step 2: Convert to fraction form
    861,840,371.10/1,209,637,619.70 = 861,840,371.10/x
  3. Step 3: Cross multiply
    861,840,371.10x = 1,209,637,619.70 × 861,840,371.10
  4. Step 4: Simplify right side
    861,840,371.10x = 1,042,514,535,058,768,768
  5. Step 5: Solve for x
    x = 1,042,514,535,058,768,768/861,840,371.10
  6. Step 6: Final answer
    x = 1,209,637,619.70

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.