Home / 1,293,474,918.40-1,940,495,812.80-638,739,606.40

Finding the Fourth Proportional to 1,293,474,918.40, 1,940,495,812.80 and 638,739,606.40

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Solution

The fourth proportional to 1,293,474,918.40, 1,940,495,812.80 and 638,739,606.40 is: 958,249,374.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,293,474,918.40 : 1,940,495,812.80 = 638,739,606.40 : x
  2. Step 2: Convert to fraction form
    1,293,474,918.40/1,940,495,812.80 = 638,739,606.40/x
  3. Step 3: Cross multiply
    1,293,474,918.40x = 1,940,495,812.80 × 638,739,606.40
  4. Step 4: Simplify right side
    1,293,474,918.40x = 1,239,471,531,688,720,128
  5. Step 5: Solve for x
    x = 1,239,471,531,688,720,128/1,293,474,918.40
  6. Step 6: Final answer
    x = 958,249,374.65

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Double scale
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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.