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Finding the Fourth Proportional to 970,663,899.20, 1,455,995,848.80 and 388,487,998.40

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Solution

The fourth proportional to 970,663,899.20, 1,455,995,848.80 and 388,487,998.40 is: 582,731,997.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    970,663,899.20 : 1,455,995,848.80 = 388,487,998.40 : x
  2. Step 2: Convert to fraction form
    970,663,899.20/1,455,995,848.80 = 388,487,998.40/x
  3. Step 3: Cross multiply
    970,663,899.20x = 1,455,995,848.80 × 388,487,998.40
  4. Step 4: Simplify right side
    970,663,899.20x = 565,636,912,979,020,992
  5. Step 5: Solve for x
    x = 565,636,912,979,020,992/970,663,899.20
  6. Step 6: Final answer
    x = 582,731,997.60

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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.