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Finding the Fourth Proportional to 914,953,965.30, 1,371,580,642.35 and 638,604,645.30

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Solution

The fourth proportional to 914,953,965.30, 1,371,580,642.35 and 638,604,645.30 is: 957,313,485.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    914,953,965.30 : 1,371,580,642.35 = 638,604,645.30 : x
  2. Step 2: Convert to fraction form
    914,953,965.30/1,371,580,642.35 = 638,604,645.30/x
  3. Step 3: Cross multiply
    914,953,965.30x = 1,371,580,642.35 × 638,604,645.30
  4. Step 4: Simplify right side
    914,953,965.30x = 875,897,769,608,267,776
  5. Step 5: Solve for x
    x = 875,897,769,608,267,776/914,953,965.30
  6. Step 6: Final answer
    x = 957,313,485.52

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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.