Home / 391,140,587,008.40-586,710,880,512.60-139,885,485,875.60

Finding the Fourth Proportional to 391,140,587,008.40, 586,710,880,512.60 and 139,885,485,875.60

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Solution

The fourth proportional to 391,140,587,008.40, 586,710,880,512.60 and 139,885,485,875.60 is: 209,828,228,813.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,140,587,008.40 : 586,710,880,512.60 = 139,885,485,875.60 : x
  2. Step 2: Convert to fraction form
    391,140,587,008.40/586,710,880,512.60 = 139,885,485,875.60/x
  3. Step 3: Cross multiply
    391,140,587,008.40x = 586,710,880,512.60 × 139,885,485,875.60
  4. Step 4: Simplify right side
    391,140,587,008.40x = 82,072,336,589,006,145,847,296
  5. Step 5: Solve for x
    x = 82,072,336,589,006,145,847,296/391,140,587,008.40
  6. Step 6: Final answer
    x = 209,828,228,813.40

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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.