Home / 1,238,916,217.52-1,710,065,419.08-809,815,840.40

Finding the Fourth Proportional to 1,238,916,217.52, 1,710,065,419.08 and 809,815,840.40

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Solution

The fourth proportional to 1,238,916,217.52, 1,710,065,419.08 and 809,815,840.40 is: 1,117,781,852.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,238,916,217.52 : 1,710,065,419.08 = 809,815,840.40 : x
  2. Step 2: Convert to fraction form
    1,238,916,217.52/1,710,065,419.08 = 809,815,840.40/x
  3. Step 3: Cross multiply
    1,238,916,217.52x = 1,710,065,419.08 × 809,815,840.40
  4. Step 4: Simplify right side
    1,238,916,217.52x = 1,384,838,064,491,248,384
  5. Step 5: Solve for x
    x = 1,384,838,064,491,248,384/1,238,916,217.52
  6. Step 6: Final answer
    x = 1,117,781,852.32

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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.