Home / 520,283,875.76-780,425,407.52-156,778,236.08

Finding the Fourth Proportional to 520,283,875.76, 780,425,407.52 and 156,778,236.08

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Solution

The fourth proportional to 520,283,875.76, 780,425,407.52 and 156,778,236.08 is: 235,167,231.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,283,875.76 : 780,425,407.52 = 156,778,236.08 : x
  2. Step 2: Convert to fraction form
    520,283,875.76/780,425,407.52 = 156,778,236.08/x
  3. Step 3: Cross multiply
    520,283,875.76x = 780,425,407.52 × 156,778,236.08
  4. Step 4: Simplify right side
    520,283,875.76x = 122,353,718,783,000,768
  5. Step 5: Solve for x
    x = 122,353,718,783,000,768/520,283,875.76
  6. Step 6: Final answer
    x = 235,167,231.74

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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.