Home / 820,459,724.40-1,230,390,988.20-411,379,916.40

Finding the Fourth Proportional to 820,459,724.40, 1,230,390,988.20 and 411,379,916.40

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Solution

The fourth proportional to 820,459,724.40, 1,230,390,988.20 and 411,379,916.40 is: 616,920,156.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,459,724.40 : 1,230,390,988.20 = 411,379,916.40 : x
  2. Step 2: Convert to fraction form
    820,459,724.40/1,230,390,988.20 = 411,379,916.40/x
  3. Step 3: Cross multiply
    820,459,724.40x = 1,230,390,988.20 × 411,379,916.40
  4. Step 4: Simplify right side
    820,459,724.40x = 506,158,141,865,029,376
  5. Step 5: Solve for x
    x = 506,158,141,865,029,376/820,459,724.40
  6. Step 6: Final answer
    x = 616,920,156.85

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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.