Home / 820,459,526.40-1,230,390,691.20-411,379,718.40

Finding the Fourth Proportional to 820,459,526.40, 1,230,390,691.20 and 411,379,718.40

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Solution

The fourth proportional to 820,459,526.40, 1,230,390,691.20 and 411,379,718.40 is: 616,919,859.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,459,526.40 : 1,230,390,691.20 = 411,379,718.40 : x
  2. Step 2: Convert to fraction form
    820,459,526.40/1,230,390,691.20 = 411,379,718.40/x
  3. Step 3: Cross multiply
    820,459,526.40x = 1,230,390,691.20 × 411,379,718.40
  4. Step 4: Simplify right side
    820,459,526.40x = 506,157,776,067,837,376
  5. Step 5: Solve for x
    x = 506,157,776,067,837,376/820,459,526.40
  6. Step 6: Final answer
    x = 616,919,859.88

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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.