Home / 515,779,639.90-773,669,459.85-257,499,313.90

Finding the Fourth Proportional to 515,779,639.90, 773,669,459.85 and 257,499,313.90

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Solution

The fourth proportional to 515,779,639.90, 773,669,459.85 and 257,499,313.90 is: 386,248,970.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,779,639.90 : 773,669,459.85 = 257,499,313.90 : x
  2. Step 2: Convert to fraction form
    515,779,639.90/773,669,459.85 = 257,499,313.90/x
  3. Step 3: Cross multiply
    515,779,639.90x = 773,669,459.85 × 257,499,313.90
  4. Step 4: Simplify right side
    515,779,639.90x = 199,219,355,096,758,592
  5. Step 5: Solve for x
    x = 199,219,355,096,758,592/515,779,639.90
  6. Step 6: Final answer
    x = 386,248,970.85

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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.