Home / 453,260,985.40-679,891,478.10-315,511,478.20

Finding the Fourth Proportional to 453,260,985.40, 679,891,478.10 and 315,511,478.20

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Solution

The fourth proportional to 453,260,985.40, 679,891,478.10 and 315,511,478.20 is: 473,267,217.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    453,260,985.40 : 679,891,478.10 = 315,511,478.20 : x
  2. Step 2: Convert to fraction form
    453,260,985.40/679,891,478.10 = 315,511,478.20/x
  3. Step 3: Cross multiply
    453,260,985.40x = 679,891,478.10 × 315,511,478.20
  4. Step 4: Simplify right side
    453,260,985.40x = 214,513,565,270,913,920
  5. Step 5: Solve for x
    x = 214,513,565,270,913,920/453,260,985.40
  6. Step 6: Final answer
    x = 473,267,217.30

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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.