Home / 718,744,140.75-991,866,915.86-388,719,279.75

Finding the Fourth Proportional to 718,744,140.75, 991,866,915.86 and 388,719,279.75

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Solution

The fourth proportional to 718,744,140.75, 991,866,915.86 and 388,719,279.75 is: 536,432,606.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,744,140.75 : 991,866,915.86 = 388,719,279.75 : x
  2. Step 2: Convert to fraction form
    718,744,140.75/991,866,915.86 = 388,719,279.75/x
  3. Step 3: Cross multiply
    718,744,140.75x = 991,866,915.86 × 388,719,279.75
  4. Step 4: Simplify right side
    718,744,140.75x = 385,557,793,140,953,088
  5. Step 5: Solve for x
    x = 385,557,793,140,953,088/718,744,140.75
  6. Step 6: Final answer
    x = 536,432,606.93

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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.