Home / 385,666,277.20-578,499,415.80-287,455,980.40

Finding the Fourth Proportional to 385,666,277.20, 578,499,415.80 and 287,455,980.40

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Solution

The fourth proportional to 385,666,277.20, 578,499,415.80 and 287,455,980.40 is: 431,183,970.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,666,277.20 : 578,499,415.80 = 287,455,980.40 : x
  2. Step 2: Convert to fraction form
    385,666,277.20/578,499,415.80 = 287,455,980.40/x
  3. Step 3: Cross multiply
    385,666,277.20x = 578,499,415.80 × 287,455,980.40
  4. Step 4: Simplify right side
    385,666,277.20x = 166,293,116,729,616,224
  5. Step 5: Solve for x
    x = 166,293,116,729,616,224/385,666,277.20
  6. Step 6: Final answer
    x = 431,183,970.60

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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.