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Finding the Fourth Proportional to 679,985.40, 1,019,978.10 and 306,737.40

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Solution

The fourth proportional to 679,985.40, 1,019,978.10 and 306,737.40 is: 460,106.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,985.40 : 1,019,978.10 = 306,737.40 : x
  2. Step 2: Convert to fraction form
    679,985.40/1,019,978.10 = 306,737.40/x
  3. Step 3: Cross multiply
    679,985.40x = 1,019,978.10 × 306,737.40
  4. Step 4: Simplify right side
    679,985.40x = 312,865,430,450.94
  5. Step 5: Solve for x
    x = 312,865,430,450.94/679,985.40
  6. Step 6: Final answer
    x = 460,106.10

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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.