Home / 403,357,280.40-605,035,920.60-385,665,325.20

Finding the Fourth Proportional to 403,357,280.40, 605,035,920.60 and 385,665,325.20

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Solution

The fourth proportional to 403,357,280.40, 605,035,920.60 and 385,665,325.20 is: 578,497,987.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,357,280.40 : 605,035,920.60 = 385,665,325.20 : x
  2. Step 2: Convert to fraction form
    403,357,280.40/605,035,920.60 = 385,665,325.20/x
  3. Step 3: Cross multiply
    403,357,280.40x = 605,035,920.60 × 385,665,325.20
  4. Step 4: Simplify right side
    403,357,280.40x = 233,341,375,075,880,384
  5. Step 5: Solve for x
    x = 233,341,375,075,880,384/403,357,280.40
  6. Step 6: Final answer
    x = 578,497,987.80

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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.