Home / 708,156,311.10-977,256,650.70-390,609,435.72

Finding the Fourth Proportional to 708,156,311.10, 977,256,650.70 and 390,609,435.72

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Solution

The fourth proportional to 708,156,311.10, 977,256,650.70 and 390,609,435.72 is: 539,041,540.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,156,311.10 : 977,256,650.70 = 390,609,435.72 : x
  2. Step 2: Convert to fraction form
    708,156,311.10/977,256,650.70 = 390,609,435.72/x
  3. Step 3: Cross multiply
    708,156,311.10x = 977,256,650.70 × 390,609,435.72
  4. Step 4: Simplify right side
    708,156,311.10x = 381,725,668,883,544,192
  5. Step 5: Solve for x
    x = 381,725,668,883,544,192/708,156,311.10
  6. Step 6: Final answer
    x = 539,041,540.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.