Home / 919,612.80-1,379,462.40-288,547.20

Finding the Fourth Proportional to 919,612.80, 1,379,462.40 and 288,547.20

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Solution

The fourth proportional to 919,612.80, 1,379,462.40 and 288,547.20 is: 432,834.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,612.80 : 1,379,462.40 = 288,547.20 : x
  2. Step 2: Convert to fraction form
    919,612.80/1,379,462.40 = 288,547.20/x
  3. Step 3: Cross multiply
    919,612.80x = 1,379,462.40 × 288,547.20
  4. Step 4: Simplify right side
    919,612.80x = 398,040,013,025.28
  5. Step 5: Solve for x
    x = 398,040,013,025.28/919,612.80
  6. Step 6: Final answer
    x = 432,834.35

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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.