Home / 715,911,204.88-987,924,808.20-398,387,148.40

Finding the Fourth Proportional to 715,911,204.88, 987,924,808.20 and 398,387,148.40

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Solution

The fourth proportional to 715,911,204.88, 987,924,808.20 and 398,387,148.40 is: 549,756,093.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,911,204.88 : 987,924,808.20 = 398,387,148.40 : x
  2. Step 2: Convert to fraction form
    715,911,204.88/987,924,808.20 = 398,387,148.40/x
  3. Step 3: Cross multiply
    715,911,204.88x = 987,924,808.20 × 398,387,148.40
  4. Step 4: Simplify right side
    715,911,204.88x = 393,576,547,172,414,912
  5. Step 5: Solve for x
    x = 393,576,547,172,414,912/715,911,204.88
  6. Step 6: Final answer
    x = 549,756,093.34

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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.